Rip tried to keep a straight face. He said mildly, "Sir, I'm surprised you even give me a chance to explain."

"I wouldn't have," O'Brine said frankly. "I would have shot off a special message to earth relieving you of command and asking for Discipline Board action. But when I saw those Connie prisoners, I knew there was more to this than just a young space-pup going vack-wacky."

"There was, Commander." Rip recited the events of the past few hours while the Irishman listened with growing amazement. He finished with, "I had to convince you in a hurry that we still held the asteroid, so I used some insulting phrases that would let you know who was talking without any doubt at all. And you did know, didn't you, sir?"

O'Brine flushed. For a long moment his glance locked with Rip's, then he roared with laughter.

Rip grinned his relief. "My apologies, sir."

"Accepted," O'Brine chuckled. "I'm sorry I won't have an excuse for dumping you in the spacepot, Foster. Your explanation is acceptable, but I have a suspicion that you enjoyed calling me names."

"I might have," Rip admitted, "but I wasn't in very good shape. The only thing I could think of was getting into air so I could have my arm treated. Commander, we've moved the asteroid. Now we have to correct course. And we have to get some new equipment, including nuclite shielding. Also, sir, I'd appreciate it if you'd let my men clean up and eat. They haven't been in air since we left the cruiser."

For answer, O'Brine strode to the operating room communicator. "Get it," he called. "The deputy commander will prepare landing boat one and issue new space suits and helmets for all Planeteers with damaged equipment. Put in two rolls of nuclite. Sergeant-major Koa will see that all Planeteers have an opportunity to clean up and eat immediately. The Planeteers will return to the asteroid in one hour."

Rip asked, "Will I be able to go into space by then?"

The doctor replied. "Your arm will be normal in about twenty minutes. It will ache some, but you'll have full use of it. We'll bring you back to the ship in about twenty-four hours for another look at it, just to be sure."

Sixty minutes later, clean, fed, and contented, the Planeteers were again on the thorium planet while the Scorpius, riding the same orbit, stood by a few miles out in space.

The asteroid and the great cruiser arched high above the belt of tiny worlds in the orbit Rip had set, traveling together toward distant Mars.



CHAPTER TWELVE - MERCURY TRANSIT

The long hours passed, and only Rip's chronometer told him when the end of a day was reached. The Planeteers alternately worked on the surface and rested in the air of the landing boat compartment while the asteroid sped steadily on its way.

When a series of sightings over several days gave Rip enough exact data to work on, he recalculated the orbit, found the amount that the course had to be corrected, and supervised the cutting of new and smaller holes in the metal.

Tubes of ordinary rocket fuel were placed in these and fired, and the thrust moved the asteroid slightly, just enough to make the corrections Rip needed. It was not necessary to take to the landing boat for these blasts. The Planeteers retired to their cave, which was now lined with nuclite as a protection against radiation.

Rip watched his dosimeter climb steadily as the radiation dosage mounted. Then he took the landing boat to the Scorpius, talked the problem over with the ship's medical department and arranged for his men to take injections that would keep them from coming down with radiation sickness.

They left the asteroid belt far behind, and passed within ten thousand miles of Mars. The Scorpius sent its entire complement of snapper-boats to the asteroid for protection, in case Consops made another try, then flamed off to Marsport to put in new supplies to replace those damaged when Rip had forced sudden and disastrous acceleration.

The asteroid had reached earth's orbit before the cruiser returned. Of course, earth was on the other side of the sun. Rip ordered a survey and found the best place on the dark side to make a new base. The Planeteers cut out a cave with the torch, lined it with nuclite, and moved in their supplies. It would be their permanent base to the end of the trip.

The sun was very hot now. On the sunny side of the asteroid the temperature had soared far past the boiling point of water. But on the dark side, Rip measured temperatures close to absolute zero.

When the Scorpius returned he arranged with Commander O'Brine for the Planeteers to take turns going to the cruiser for showers and decent meals.

The asteroid approached the orbit of Venus, but the bright planet was some distance away, at its greatest elongation to the east of the sun. Mercury, however, loomed larger and larger. They would pass close to the hot planet.

O'Brine recalled Rip to the Scorpius and handed him a message.

ASTEROID NOW WITHIN PROTECTION REACH OF MERCURY AND TERRA BASES. YOUR ESCORT NO LONGER REQUIRED. PROCEED IMMEDIATELY TITAN, TAKE ON CARGO AND PERSONNEL.

The commander sighed. "Looks like I'll never get to earth long enough to see my family."

Rip sympathized. "Tough, sir. Perhaps the cargo from Titan will be scheduled for Terra."

"That's what I hope," O'Brine agreed. "Well, here's where we part. Is there anything you need?"

Rip made a mental check on supplies. He had more than enough. "The only thing we need is a long-range communicator, sir. If you're leaving, we'll have no way to contact the planet bases."

"I'll see that you get one." The Irishman thrust out his hand. "Stay out of high vack, Foster. Too bad you didn't join us instead of the Planeteers. I might have made a decent officer out of you."

Rip grinned. "That's a real compliment, sir. I might return it by saying I'd be glad to have you as a Planeteer corporal any time."

O'Brine chuckled. "All right. Let's declare a truce, Planeteer. We'll meet again. Space isn't very big."

A short time later Rip stood in front of his asteroid base and watched the great cruiser drive into space. A short distance away a snapper-boat was lashed to the landing boat. O'Brine had insisted on leaving it, with a word of warning.

"These Connies are plenty smart. I don't like leaving you unprotected, even within reach of Mercury and Terra, but orders are orders. Keep the snapper-boat and you'll at least be able to put up a fight if you bump into trouble."

The asteroid sped on its lonely way for two days and then a cruiser came out of space, its nuclear drive glowing. The Planeteers manned the rocket launcher and Rip and Santos stood by the snapper-boat just in case, but the cruiser was the Sagittarius, out of Mercury.

Captain Go Sian-tek, a Chinese Planeteer officer, arrived in one of the cruiser's landing boats accompanied by three enlisted Planeteers. They were all from the Special Order Squadron on Mercury.

Captain Go greeted Rip and his men, then handed over a plastic stylus plate ordering Rip to deliver six cubic meters of thorium for use on Mercury. While Koa supervised the cutting of the block, Rip and the captain chatted.

The Mercurian Planeteer base was in the twilight zone, but the Planeteers did all their work on the sun side, using special alloy suits to mine the precious nuclite that only the hot planet provided.

At some time during its first years, Mercury had been so close to the sun that its temperature was driven high enough to permit a subatomic thermo-nuclear reaction. The reaction had shorn some elements of their electrons and left a thin coating of material composed almost entirely of neutrons. The nuclite was incredibly dense. It could be handled only in low gravity because of its weight. But nothing else provided the shielding against radiation and meteors half so well and it was in great demand for spaceship skins.

"Things aren't so bad," Go told Rip. "The base is comfortable and we only work a two hour shift out of each ten. We've had a plague of silly dillies recently. They got into one man's suit while we were working, but mostly they're just a nuisance."

Rip had heard of the creatures. They were like earth armadillos, except that they were silicon animals and not carbon like those of earth. They were drawn to oxygen like iron to a magnet, and their diamond hard tongues, used for drilling rock in order to get the minerals on which they lived, could drive right through a space suit. Or, if they could work undetected for a short while, they could drill through the shell of a space station.

Scralabus primus was the scientific name of the creature, but the fact that it looked like a silicon armadillo had given it the popular name of "silly dilly." Apart from its desire for oxygen it was harmless.

Koa reported, "Sir, the block of thorium is ready. We've hung it on a line behind the landing boat. The blast won't hurt it, and it's too big to get inside the boat."

"Fine, Koa. Well, Captain, that does it."

The Mercurian Planeteers got into their craft and blasted off, trailing the block of thorium in their exhaust. Rip watched the cruiser take the craft and thorium aboard, then drive toward Mercury, brilliant sunlight reflecting from its sleek sides. The planet was only a short distance away by spaceship. It was the largest thing in space, except for the sun, as seen from the asteroid. To Rip it looked about three times the size of the moon as seen from earth.

Past the orbit of Mercury, the sun side of the asteroid grew dangerously hot for men in space suits. Rip and the Planeteers stayed in the bitter cold of the dark side, which ceased to be entirely dark. Even the temperature rose somewhat. They were close enough to the sun so that the prominences, great flaming tongues of hydrogen that sped many thousands of miles into space, gave them light and enough heat to register on Rip's instruments.

Mercury was left far behind, and earth could not be seen because of the sun. There was nothing to do now but ride out the rest of the trip as comfortably as possible until it was time to throw the asteroid into an ever-tightening series of elliptical orbits around earth, known as braking ellipses. The method would use earth's gravity to slow them down to the proper speed. A single atomic bomb and a half dozen tubes of rocket fuel remained.

Then, as Rip was enjoying the comfort of air during his off-watch hour in the boat compartment, Koa beat an alarm on the door.

Rip and the Planeteers with him hurriedly got into space suits and opened up.

"It's Terra base calling on the communicator, sir," Koa reported. "Urgent message, they said, and they want to talk to you, personally."

Rip hurried to the base cave. The communicator indicator light was glowing red. He plugged in his helmet circuit and said, "This is Lieutenant Foster. Go ahead."

A voice crackled across space from earth. "This is Terra base. Foster, a Consops cruiser has apparently been hiding behind the sun waiting for you. Our screens just picked it up, heading your way. We've sent orders to the Sagittarius on Mercury to give you cover, and the Aquila has taken off from here. But get this, Foster. The Consops cruiser will reach you first. You have about one hour. Do you understand?"

Rip understood all right. He understood too well. "Got you," he said shortly. "Now what?"

The communicator buzzed. "Take any appropriate action. You're on your own, Foster. Sorry. Sending the cruisers is all we can do. We'll stand by for word from you. If you think of any way we can help, let us know."

Rip asked, "How long before the cruisers arrive?"

"You're too close to us for them to move fast. They'll have to use time accelerating and decelerating. The Sagittarius should arrive in something less than two hours and the Aquila a few minutes later."

The communicator paused, then continued. "One thing more, Foster. The Connies know how badly we want that asteroid, but they also know we don't want it enough to start a war. Got that?"

"Got it," Rip stated wryly. "I got it good. Thanks for the warning, Terra base. Foster off."

"Terra base off. Stay out of high vack."

Fine advice, if it could be taken. Rip stared up at the brilliant stars, thinking fast. The Connie would have almost an hour's lead on the space patrol cruisers. In that hour, if the Connie were willing to pay the price in blasted snapper-boats, Consops would have the asteroid. And Terra base had made it clear that the space patrol would not try to blast the Connie cruiser and take back the asteroid, because that would mean war.

Added together, the facts said just one thing: they had one hour in which to think of some way to hold off the Connies for an additional hour.

The Planeteers were clustered around him. Rip asked grimly, "Any of you ever study the ancient art of magic?"

The Planeteers remained silent and tense.

"Magic is what we need," Rip told them. "We have to make the whole asteroid disappear, or else we have to conjure up a space cruiser out of the thorium. Otherwise, we have a little more than an hour before we're either prisoners or dead!"



CHAPTER THIRTEEN - PERIL AT PERIHELION

Sergeant-major Koa had made no comment since notifying Rip of the call from Terra base. Now he asked thoughtfully, "Lieutenant, can the Connie launch boats this close to the sun? Won't the sun's pull suck them right in?"

Corporal Pederson scoffed, "Naw, Koa. If sun's gravity be that strong, it pull us in, too."

"Not quite, Pederson," Rip corrected. "Koa is on the right track. The pull of the sun is pretty strong. But I don't think it's strong enough to capture boats."

He had figured the asteroid's orbit to pass as close to the sun as possible while maintaining a margin of safety. He had wanted to use the sun's gravity to pick up speed. His regular star sightings had told him several days before that the sun was dragging them.

But Koa had started a train of ideas running through Rip's head. If they could get close enough to the sun so small boats would be unable to break free of its gravity, the Connie wouldn't dare send a landing force. The powerful engines of a cruiser could break loose from Sol's pull, but not the chemical jets of a cruiser's boats.

Rip got his instruments and pulled out a special slide rule designed for use in space. He had Koa stand by with stylus and computation board and take down figures as he called them off.

He recalculated the safety factor he had used when deciding how close to put the asteroid to the sun, then took quick star sights to determine their exact position. They were within a few miles of perihelion, the point at which they would be closest to Sol.

Rip tapped gloved fingers on his helmet absently. If they could blast out of the orbit and drive into the sun ... he estimated the result. A few miles per second of extra speed would put them so far within the sun's field of gravity that, within an hour or so, small boats would venture into space only at their peril.

He reviewed the equipment. They had tubes of rocket fuel, but the tubes wouldn't give the powerful thrust needed for this job. They had one atomic bomb. One wasn't enough. Not only must they drive toward the sun, they must keep reserve power to blast free again. If only they had a pair of nuclear charges!

He called his Planeteers together and outlined the problem. Perhaps one of them would have an idea. But no useful suggestions were forthcoming until little Dominico spoke up. "Sir, why don't we make two bombs from one?"



"Sir, Why Don't We Make Two Bombs From One?"

"I wish we could," Rip said. "Do you know how, Dominico?"

"No, Lieutenant. If we had parts, I could put bombs together. I can take them apart, but I don't know how to make two out of one." The Italian Planeteer looked accusingly at Rip. "I thought maybe you know, sir."

Rip grunted. If they had parts, he could assemble nuclear bombs, too. Part of his physics training had been concerned with fission and its various applications. But no one had taught him how to make two bombs out of one.

The theory of nuclear explosions was simple enough. Two or more correctly sized pieces of plutonium or uranium isotope, when brought together, formed what was known as a critical mass, which would fission. The fissioning released energy and produced the explosion.

But there was a wide gap between theory and practice. A nuclear bomb was actually pretty complicated. It had to be complicated to keep the pieces of the fissionable material apart until a chemical explosion drove them together fast and hard enough to create a fission explosion. If the pieces weren't brought together rapidly enough, the mass would fission in a slow chain reaction and no explosion would result.

Rip was trained in scientific analysis. He tackled the problem logically, considering the design of a nuclear bomb and the reasons for it.

Atomic bombs had to be carried. That meant an outer casing was necessary. Probably the casing had a lot to do with the design. Suppose no casing were required? What would be needed?

He took the stylus and computation board from Koa and jotted down the parts required. First, two or more pieces of plutonium large enough to form a critical mass. Second, a neutron source—some material with the type of radioactivity that produced neutrons—to start the reaction. Third, some kind of neutron reflector. And fourth, explosive to drive the pieces together.

Did they have all those items? He checked them off. Their single five KT bomb contained at least enough plutonium for two critical masses, if brought together inside a good neutron reflector. Each mass should give about a two kiloton explosion. And they did have a good neutron reflector—nuclite. There wasn't anything better for the purpose.

"What have we got for a neutron source?" he asked aloud. He was really asking himself, but he got a quick answer from Koa.

"Sir, some of the stuff left in the craters from the other explosions gives off neutrons."

"You're right," Rip agreed instantly. A small piece from one of the craters, when combined with half of the neutron source in the bomb, should be enough. As for the explosive, they had exploding heads on their attack rockets.

In other words, he had what he needed—except for a method of putting all the pieces together to create a bomb.

If only they had a tube of some sort that would withstand the chemical explosion—the one that brought the critical mass together!

He told the Planeteers what he had been thinking, then asked, "Any ideas for a tube?"

"How about a tube from the snapper-boat?" Santos suggested.

Rip shook his head. "Not strong enough. They're designed to withstand the slow push of rocket fuel, not the fast rap of an explosion. When I say slow, I mean slow-burning when compared with explosive. Who has another idea?"

Kemp, the expert torchman, said, "Sir, I can burn you a tube into the asteroid."

Rip grabbed the Planeteer so hard they both floated upward. "Kemp, that's wonderful! That's it!" The details took form in his mind even as he called orders. "Dominico, tear down that bomb. Santos, remove two heads from your rockets and wire them to explode on electrical impulse. Kemp, we'll want the tube just a fraction of an inch wider than a rocket head. Get your torch ready."

He took the stylus and began calculating. He talked as he worked, telling the Planeteers exactly what they were up against. "I'm figuring out where to put the charge so it will do the most good, but my data isn't complete. If our homemade bomb goes off, I don't know exactly how much power it will give. If it gives too much, we'll be driven so close to the sun well never get free of its gravity."

Bradshaw, the English Planeteer, said mildly, "Don't worry, Lieutenant. We're caught either way. If it isn't the solar frying pan, it's Connie fire."

A chorus of agreement came from the other Planeteers. What a crew! Rip thought. What a great gang of space pirates!

He finished his calculations and found the exact spot where Kemp would cut. A few feet away from the spot was a thick pyramid of thorium. That would do, and they could cut into it horizontally instead of drilling straight down. He pointed to it. "Let's have a hole straight in for six feet. And keep it straight, Kemp. Allow enough room for a lining of nuclite. Koa, pull a sheet of nuclite out of the cave and cut it to size."

Kemp's torch already was slicing into the metal. Rip asked, "Can you weld with that thing, Kemp?"

"Just show me what you want, sir."

"Good." Rip motioned to Trudeau. "Frenchy, we'll need a strong rod at least eight feet long."

The French Planeteer hurried off. Rip consulted his chronometer. Less than ten minutes had passed since the call from Terra base.

He went over his plan again. It had to work! If it didn't, asteroid and Planeteers would end up as subatomic particles in the sun's photosphere, because he had calculated his blast to drive the asteroid past the limit of safety. It was the only way he could be sure of putting them beyond danger from Connie landing boats or snapper-boats. The Connie would have only one chance—to bring his cruiser down on the asteroid.

If he tried that, Rip thought grimly, he would get a surprise. The second nuclear charge would be set, ready to be fired. The Connie cruiser was so big that no matter how it pulled up to the asteroid, some part of it would be close enough to the charge to be blown into space dust. No cruiser could survive an atomic explosion within five hundred yards, and the Connie would have to get closer to the nuclear charge than that.

Dominico reported that the bomb had been dismantled. Rip went to it and examined the raw plutonium, being careful to keep the pieces widely separated.

This particular bomb design used five pieces of plutonium which were driven together to form a ball. Rip made a quick estimate. Two were enough to form a critical mass. He would use two to blast into the sun and three to blast out again. He would need the extra kick.

There was only one trouble. The pieces were wedge shaped. They would have to be mounted in thorium in order to keep them rigid. Only Kemp could do that. They had no cutting tool but the torch.

Santos appeared, carrying a rocket head under each arm. They had wires wound around them, ready to be attached to an electrical source.

Rip hurried back to where Kemp was at work. The private was using a cutting nozzle that threw an almost invisible flame five feet long. In air, the nozzle wouldn't have worked effectively beyond two feet, but in space it cut right down to the end of the flame. Kemp had his arm inside the hole and was peering past it as he finished the cut.

"Done, sir," he said, and adjusted the flame to a spout of red fire. He thrust the torch into the hole and quickly withdrew it as pieces of thorium flew out. A stream of water hosed into the tube would have washed them out the same way.

Rip took a block of plutonium from Dominico and handed it to Kemp. "Cut a plug and fit this into it. Then cut a second plug for the other piece. They have to match perfectly, and you can't put them together to try out the fit. If you do, we'll have fission right here in the open."

Kemp searched and found a piece he had cut in making the tube. It was perfectly round, ideal for the purpose. He sliced off the inner side where it tapered to a cone, then, working only by eye estimate, cut out a hole in which the wedge of fission material would fit. He wasn't off by a thirty-second of an inch. Skillful application of the torch melted the thorium around the wedge and sealed it tightly.

Koa was ready with a sheet of nuclite. Trudeau arrived with a long pole he had made by lashing two crate sticks together.

Rip gave directions as they formed a cylinder of nuclite. Kemp spot-welded it, and they pushed it into the hole, forming a lining.

Nunez found a small piece of material in one of the earlier craters. It would provide some neutrons to start the chain reaction. Rip added it to the front of the plutonium wedge along with a piece of beryllium from the bomb, and Kemp welded it in place.

They put the thorium block which contained the plutonium into the hole, the plutonium facing outward. Trudeau rammed it to the bottom with his pole. The neutron source, the neutron reflector, and one piece of fissionable material were in place.

Kemp sliced another round block of thorium out of a near-by crystal and fitted the second wedge of plutonium into it. At first Rip had worried about the two pieces of plutonium making a good enough contact, but Kemp's skillful hand and precision eye removed that worry.

The torchman finished fitting the plutonium and carried the block to the tube opening. He tried it, removed a slight irregularity with his torch, then said quietly, "Finished, sir."

Rip took over. He slid the thorium-plutonium block into the tube, took a rocket head from Santos and used it to push the block in farther. When the rocket head was about four inches inside the tube, its wires trailing out, Rip called Kemp. At his direction, the torchman sliced a thin slot up the face of the crystal. Rip fitted the wires into it and held them in place with a small wedge of thorium.

Kemp cut a plug, fitted it into the hole, and welded the seams closed. The tube was sealed. When electric current fired the rocket head, the thorium carrying the plutonium wedge would be driven forward to meet the wedge in the back. And, unless Rip had miscalculated the mass of the two pieces, they would have their nuclear blast. Rip surveyed the crystal with some anxiety. It looked right.

Dominico already had rigged the timer from the atomic bomb. He connected the wires, then looked at Rip. "Do I set it, sir?"

"Load the communicator, the extra bomb parts, the rocket launcher and rockets, the cutting equipment, my instruments, and the tubes of fuel," Rip ordered. "Leave everything else in the cave."

The Planeteers ran to obey. Rip waited until the landing boat was nearly loaded, then told Dominico to set the timer for five minutes. He wondered how they would explode the second charge, since they had only the one timer left, then forgot about it. Time enough to worry when faced with the problem.

"I'll take the snapper-boat," he stated. "Santos in the gunner's seat. Koa in charge in the landing boat. Dowst pilot. Let's show an exhaust."

He fitted himself into the tight pilot seat of the snapper-boat while Santos climbed in behind. Then, handling the controls with the skill of long practice, he lifted the tiny fighting rocket above the asteroid and waited for the landing boat. When it joined up, Rip led the way to safety. As he cut his exhaust to wait for the explosion, he sighted past the snapper-boat's nose to the asteroid.

He was moving, and the direction of his move told him the sun was already pulling. Its pull was strong, too. He cut his jets back on, just to hold position, and saw Dowst do the same.

Another few miles toward the sun and the landing boat wouldn't have the power to get away from Sol's gravity. A few miles beyond that, even the powerful little snapper-boat would be caught.

Below, the timer reached zero. A mighty fan of fire shot into space. The asteroid shuddered from the blast, then swerved gradually, picking up speed as well as new direction.

Rip swallowed hard. Now they were committed. They would reach a new perihelion far beyond the limits of safety. P for perihelion and P for peril. In this case, they were the same thing!



CHAPTER FOURTEEN - BETWEEN TWO FIRES

Back on the asteroid, the Planeteers started laying the second atomic charge. Rip selected the spot, found a near-by crystal that would serve to house the bomb, and Kemp started cutting.

The Planeteers knew what to do now, and the work went rapidly. Rip kept an eye on his chronometer. According to the message from Terra base, he had about fifteen minutes before the Consops cruiser arrived.

"We have one advantage we didn't have back in the asteroid belt," he remarked to Koa. "Back there they could have landed anywhere on the rock. Now they have to stick to the dark side. Snapper-boats could last on the sun side, but men in ordinary space suits couldn't."

"That's good," Koa agreed. "We have only one side to defend. Why don't we put the rocket launcher right in the middle of the dark side?"

"Go ahead. And have all men check their pistols and knives. We don't know what's likely to happen when that Connie flames in."

Rip walked over to the communicator and plugged his suit into the circuit. "This is the asteroid calling Terra base. Over."

"This is Terra base. Go ahead, Foster. How are you doing?"

"If you need anything cooked, send it to us," Rip replied. "We have heat enough to cook anything, including tungsten alloy." He explained briefly what action they had taken.

A new voice came on the communicator. "Foster, this is Colonel Stevens."

Rip responded swiftly, "Yes, sir!" Stevens was the top Planeteer, commanding officer of all the Special Order Squadrons.

"We've piped this circuit into every channel in the system," the colonel said. "Every Planeteer in the Squadrons is listening, and rooting for you. Is there anything we can do?"

"Yes, sir," Rip replied. "Do you know if Terra base has plotted our course this far?"

There was a brief silence, then the colonel answered, "Yes, Foster. We have a complete track from the time you started showing on the Terra screens, about halfway between the orbits of Mars and earth."

"Did you just get our change of direction?"

"Yes. We're following you on the screens."

"Then, sir, I'd appreciate it if you'd put the calculators to work and make a time-distance plot for the next few hours. The blast we're saving to push back to safety is about three kilotons. Let us know the last moment when we can fire and still get free of Sol's gravity."

"You'll have it within fifteen minutes. Anything else, Foster?"

"Nothing else I can think of, sir."

"Then good luck. We'll be standing by."

"Yes, sir. Foster off."

Rip disconnected and turned up his helmet communicator, repeating the conversation to his men. Koa came and stood beside him. "Lieutenant, how do we set off this next charge?"

There was only one way. When the time came to blast, they would be too close to the sun to take to the boats. The blast had to be set off from the asteroid.

"We'll get underground as far away from the bomb as we can," Rip said. He surveyed the dark side, which was rapidly growing less dark. "I think the second crater will do. Kemp can square it off on the side toward the blast to give us a vertical wall to hide behind."

Koa looked doubtful. "Plenty of radiation left in those holes, sir."

Rip grinned mirthlessly. "Radiation is the least of our problems. I'd rather get an overdose of gamma than get blasted into space."

A yell rang in his helmet. "Here comes the Connie!"

Rip looked up, startled. The Consops cruiser passed directly overhead, about ten miles away. It was decelerating rapidly. Rip wondered why they hadn't spotted it earlier and realized the Connie had come from the direction of the hot side.

The enemy cruiser was probably the same one that had attacked them before. He must have lain in wait for days, keeping between the sun and Terra. That way, the screens wouldn't pick him up, since only a few observatories scanned the sun regularly. To the observatories, the cruiser would have been only a tiny speck, too small to be noticed. Or if they had noticed it, the astronomers probably decided it was just a very tiny sunspot.

The Planeteers worked with increased speed. Kemp welded the final plug into place, then hurried to the crater from which they would set off the charge. Dominico and Dowst connected the wires from the rocket head to a reel of wire and rolled it toward the crater. Nunez got a hand-driven dynamo from the supplies and tested it for use in setting off the charge. Santos stood by the rocket launcher, with Pederson ready to put another rack of rockets into the device when necessary.

Rip and Koa watched the Connie cruiser. It decelerated to a stop for a brief second, then started moving again, with no jets showing.

"That's the sun pulling," Rip said exultantly. "They'll have to keep blasting to maintain position."

The Consops commander didn't wait to trim ship against the sun's drag. His air locks opened, clearly visible to Rip and Koa because that side of the cruiser was brilliant with sunlight. Ten snapper-boats sped forth. Rip was certain now that this was the enemy cruiser they had fought off back in the asteroid belt. Two Connie snapper-boats had been destroyed in that clash, which explained why the commander was sending out only ten boats, instead of the full quota of twelve.

The squadron instantly formed a V, like a strange space letter made up of globes. The sun's gravity pulled at them, dragging them off course. Rip watched as flames poured from their stern tubes. They were firing full speed ahead, but the drag of the sun distorted their line of flight into a great arc.

Rip saw the strategy instantly. The Connie commander knew the situation exactly, and he was staking everything in one great gamble, sending his snapper-boats to land on the asteroid—to crash land if necessary.

The asteroid was so close to the sun that even the powerful fighting rockets would use most of their fuel in simply combatting its gravity.

"All hands stand by to repel Connies," Rip shouted, and drew his pistol. He looked into the magazine, saw that he had a full clip, and then charged the weapon.

Santos was crouched over the rocket launcher, his space gloves working rapidly as he kept the rockets pointed at the enemy.

Rip called, "Santos, fire at will."

The Planeteers formed a skirmish line which pivoted on the launcher. Only Kemp remained at work. His torch flared, slicing through the thorium as he prepared their firing position.

The atomic charge was ready. The wires had been laid up to the rim of the crater in which Kemp worked, and the dynamo was attached.

Rip was everywhere, checking on the launcher, on Kemp, on the pistols of his men. And Santos, hunched over his illuminated sight, watched the Connie snapper-boats draw near.

"Here we go," the Filipino corporal muttered. He pressed the trigger.

The first rocket sped outward in a sweeping curve, and for a moment Rip opened his mouth to yell at Santos. The sun's gravity affected the attack rockets, too! Then he saw that the corporal had allowed for the sun's pull.

The rocket curved into the squadron of oncoming boats and they all tried to dodge at once. Two of them met in a sideways crash, then a third staggered as its stern globe flared and exploded. Santos had scored a hit!

Rip called, "Good shooting!"

The corporal's reply was rueful, "Sir, that wasn't the one I aimed at. The sun's pull is worse than I figured."

The damaged snapper-boat instantly blasted from its nose tubes, decelerated and went into reverse, flipping through space crabwise as it tried to regain the safety of the cruiser. The two boats that had crashed while trying to dodge were blasting in great spurts of flame, following the example of their damaged companion.

"Seven left," Rip called, and another rocket flashed on its way. He followed its trail as it curved away from the asteroid and into the squadron. Its proximity fuse detonated in the exhaust of a Connie boat, blowing the tube out of position. The boat yawed wildly, cut its stern tubes, and blasted to a stop from the bow tube. Then it, too, started backward toward the cruiser.

Six left!

Flame blossomed a few yards from Rip. He was picked up bodily and flung into space, whirling end over end. Koa's voice rang in his helmet.

"Watch it! They're firing back!"

Rip tugged frantically at an air bottle in his belt. He pulled it out and used it to whirl him upright again, then its air blast drove him back to the surface of the asteroid. Sweat poured from his forehead and the suit ventilator whined as it worked to pick up the extra moisture. Great Cosmos! That was close.

Koa called, "All right, sir?"

"Fine."

Santos fired again, twice, in rapid succession. The Connie snapper-boats scattered as the proximity fuses produced flowers of fire among them. Two near misses, but they threw the enemy off course. Rip watched tensely as the boats fought to regain their course. He knew asteroid, cruiser, and boats were speeding toward the sun at close to 50 miles a second, and the drag was getting terrific. The Connies knew it too.

There was an exultant yell from the Planeteers as two of the boats gave up and turned back, using full power to regain the safety of the mother ship.

Four left, and they were getting close!

Santos scored a direct hit on the nose of the nearest one, but its momentum drove it within a few yards of the asteroid. Five space-suited figures erupted from it, holding hand propulsion units, tubes of rocket fuel used for hand combat in empty space.

The Connies lit off their propulsion tubes and drove feet first for the asteroid. The Planeteers estimated where the enemy would land, and were there waiting with pointed handguns. The Connies had their hands over their heads, holding the propulsion tubes. They took one look at the gleaming Planeteer guns and their hands stayed upright.

The Planeteers lashed the Connies' hands behind them with their own safety lines and, at Rip's orders, dumped all but one of them into the crater where Kemp was just finishing.

Three snapper-boats remained. Rip watched, holding tightly to the arm of the Connie he had kept at his side. The man wore the insignia of an officer.

The remaining snapper-boats were going to make it. Santos threw rockets among them and scored hits, but the boats kept coming. The Connies were too far away from the cruiser to return, and they knew it. Getting to the asteroid was their only chance.

Rip called, "Santos. Cease fire. Set the launcher for ground level. Let them land, but don't fire until I give the word." He hoped his plan would work. Experience back in the asteroid belt had taught him something about Connies.

He put his helmet against his prisoner's for direct communication. "You speak English?"

The man shouted back, "Yes."

"Good. We're going to let your friends land. As soon as they do, I want you to yell to them. Say we have assault rockets trained on them. Tell them to surrender or they'll be killed in their tracks. Got that?"

The Connie replied, "Suppose I refuse?"

Rip put his space knife against the man's stomach. "Then we'll get them with rockets. But you won't care because you won't know it."

The truth was, Santos couldn't hope to get them all with his rockets. They might overcome the Connies in hand-to-hand fighting, but there would be a cost to pay in Planeteer casualties. Rip hoped the Connie wouldn't call his bluff, because that's all it was. He couldn't use a space knife on an unarmed prisoner.

The Connie didn't know that. In Rip's place he would have no compunctions about using the knife, so instead of calling Rip's bluff he agreed.

The snapper-boats blew their front tubes, decelerating, and squashed down to the asteroid in a roar of exhaust flames, sending the Planeteers running out of the way. Rip thrust harder with his space knife and yelled, "Tell them!"

The Connie officer nodded. "Turn up my communicator."

Rip turned it on full, and the Connie barked quick instructions. The exhausts died and five men filed out of each boat with hands held high. Rip blew a drop of perspiration from the tip of his nose. Empty space! It was a good thing Connie morale was bad. The enemy's willingness to surrender had saved them a costly fight.

The Planeteers rounded up the prisoners and secured them while Rip took an anxious look at the communicator. It was about time he heard from Terra base.

The light was glowing. For all he knew, it might have been glowing for many minutes. He plugged into the circuit.

"This is Foster on the asteroid."

"Terra base to Foster. Listen, you will reach optimum position on the time-distance curve at twenty-three-oh-six. Repeat back, twenty-three-oh-six."

"Got it. We will reach optimum position at twenty-three-oh-six." He looked at his chronometer and his pulse stopped. It was 2258! They had just eight minutes before the sun caught them forever, atomic blast or no!

And the Connie cruiser was still overhead, with no friendly cruisers in sight. He looked up, white-faced. Not only was the Connie still there, but its main air lock was sliding open to disclose a new danger.

In the opening, ready to launch, an assault boat waited. The assault boats were something only the Connies used. They were about four times the size of a snapper-boat, less maneuverable but more powerful. They carried 20 men and a pair of guided missiles with atomic warheads!



CHAPTER FIFTEEN - THE ROCKETEERS

Rip ran for the snapper-boat, feet moving as rapidly as lack of gravity would permit. He called instructions. "Santos! Turn the launcher over to Pederson and come with me. Koa, take over. Start throwing rockets at that boat and don't stop until you run out of ammunition."

He reached the snapper-boat and squeezed in, Santos close behind him. As he strapped himself into the seat he called, "Koa! Get this, and get it straight. At twenty-three-oh-five, fire the bomb. Fire it whether I'm back or not. Got that?"

Koa replied, "Got it, sir."

That would give the Planeteers a minute's leeway. Not much of a safety margin, especially when he wasn't sure how much power the improvised atomic charge would produce.

He plugged into the snapper-boat's communicator and called, "Ready, Santos?"

"Ready, Lieutenant."

He braced himself against acceleration and flipped the speed control to full power. The fighting rocket rammed out from the asteroid, snapping him back against the seat. He made a quick check. Gunsight on, fuel tanks almost full, propulsion tubes racked handy to his hand, space patches ready to be grabbed and slapped on in case an enemy shot holed helmet or suit.

They drove toward the enemy cruiser at top speed, swerving in a great arc as the sun pulled at them. The enemy's big boat was out of the ship, its jets firing as it started for the asteroid.

Rip leaned over his illuminated gunsight. The boat showed up clearly, the rings of the sight framing it. He estimated distance and the pull of the sun, then squeezed the trigger on the speed control handle. The cannon in the nose spat flame. He watched tensely and saw the charge explode on the hull of the Connie cruiser. He had underestimated the sun's drag. He compensated and tried again.

He missed. Now that he was closer and the charge had less distance to travel, he had overestimated the sun's effect. He gritted his teeth. The next shot would be at close range.

The fighting rocket closed space, and the landing boat loomed large in the sight. He fired again and the shot blew metal loose from the top of the boat's hull. A hit, but not good enough. He leaned over the sight to fire again, but before he had sighted an explosion blew the landing boat completely around.

Koa and Pederson had scored a hit from the asteroid!

The big boat fired its side jets and spun around on course again. Flame bloomed from its side as Connie gunners tried to get the range on the snapper-boat.

Rip was within reach now. He fired at point-blank range and flashed over the boat as its front end exploded. Santos, firing from the rear, hit it again as the snapper-boat passed.

Rip threw the rocket into a turn that rammed him against the top of his harness. He steadied on a line with the crippled Connie craft. It was hard hit. The bow jets flickered fitfully, and the stern tubes were dead. He sighted, fired. A charge hit the boat aft and blew its stern tubes off completely.

And at the same moment, a Connie gunner got a perfect bead on the snapper-boat.

Space blew up in Rip's face. The snapper-boat slewed wildly as the Connie shot took effect. Rip worked his controls frantically, trying to straighten the rocket out more by instinct than anything else.

His eyes recovered from the blinding flash and he gulped as he saw the raw, twisted metal where the boat's nose had been. He managed to correct the boat's twisting by using the stern tubes, but he was no longer in full control.

For a moment panic gripped him. Without full control he couldn't get back to the asteroid! Then he forced himself to steady down. He sized up the situation. They were still underway, the stern tubes pushing, but their trajectory would take them right under the crippled Connie boat. The sun was blazing into the fighting rocket with such intensity that he had trouble seeing.

There was nothing he could do but pass close to the Connie. The enemy gunners would fire, but he had to take his chances. He looked down at the asteroid and saw an orange trail as Koa launched another rocket.

The shot from the asteroid ticked the bottom of the Connie boat and exploded. The Connie rolled violently. Tubes flared as the pilot fought to correct the roll. He slowed the spinning as Rip and Santos passed, just long enough for a Connie gunner to get in a final shot.

The shell struck directly under Rip. He felt himself pushed violently upward, and at the same moment he reacted, by hunch and not by reason. He rammed the controls full ahead and the dying rocket cut space, curving slowly as flaming fuel spurted from the ruptured tanks.

Rip yelled, "Santos! You all right?"

"I think so. Lieutenant, we're on fire!"

"I know it. Get ready to abandon ship."

When the main mass of fuel caught, the rocket would become an inferno. Rip smashed at the escape hatch above his head, grabbed propulsion tubes from the rack and called, "Now!"

He pulled the release on his harness, stood up on the seat, and thrust with all his leg power. He catapulted out of the burning snapper-boat into space.

Santos followed a second later and the crippled rocket twisted wildly under the two Planeteers.

"Don't use the propulsion tubes," Rip called. "Slow down with your air bottles." He thrust the tubes into his belt, found his air bottles, and pointed two of them in the direction they had been traveling. He wanted to come to a stop, to let the wild snapper-boat get away from them.

The compressed air bottles did the trick. He and Santos slowed down as the little jets overcame the inertia that was taking them along with the burning boat. The boat was spiraling now, and burning freely. It moved away from them, its stern jets firing weakly as fuel burned in the tank.

Rip took a look toward the enemy cruiser. The assault boat was no longer showing an exhaust. Instead, it was being dragged rapidly away from the Connie cruiser by the pull of the sun. At least they had hit it in time to prevent launching of the atomic guided missiles. Or, he thought, perhaps the enemy had never intended using them. The principal effect, besides killing the Planeteers, would have been to drive the asteroid into the sun at an even faster rate.

The enemy assault boat was no longer a menace. Its occupants would be lucky if they succeeded in saving their own lives.



Rip and Santos Fell Through Space

Rip wondered what the Connie cruiser commander would try now. Only one thing remained, and that was to set the cruiser down on the asteroid. If the Connie tried, he would arrive at just about the time set for releasing the nuclear charge. And that would be the end of the cruiser—and probably of the Planeteers as well.

Santos asked coolly, "Lieutenant, wouldn't you say we're in sort of a bad spot?"

Rip had been so busy sizing up the situation that he hadn't thought about his own predicament. Now he looked down and suddenly realized that he was floating free in space, a considerable distance above the asteroid, and with only small propulsion tubes for power.

He gasped, "Great space! We're in a mess, Santos."

The Filipino corporal asked, still in a calm voice, "How long before we're dragged into the sun, sir?"

Rip stared. Santos had used the same tone he might have used in asking for a piece of Venusian chru. An officer couldn't be less calm, so Rip replied in a voice he hoped was casual, "I wouldn't worry, Santos. We won't know it. The heat will get through our suits long before then."

In fact, the heat should be overloading their ventilating systems right now. In a few minutes the cooling elements would break down and that would be the end. He listened for the accelerated whine as the ventilating system struggled under the increased heat load, and heard nothing.

Funny. Had it overloaded and given out already? No, that was impossible. He would be feeling the heat on his body if that were the case.

He looked for an explanation and realized for the first time that they weren't in the sunlight at all. They were in darkness. His searching glance told him they were in the cone of shadow stretching out from behind the asteroid. The thorium rock was between them and the sun!

His lips moved soundlessly. Major Joe Barris had been right! In a jam, trust your hunch. He had acted instinctively, not even thinking what he was doing as he used the last full power of the stern tubes to throw them into the shadow cone.

And he knew in the same moment that it could save their lives. The sun's pull would only accelerate their fall toward the asteroid. He said exultantly, "We're staying out of high vack, Santos. Light off a propulsion tube. Let's get back to the asteroid."

He pulled a tube from his belt, held it above his head, and thumbed the striker mechanism. The tube flared, pushing downward on his hand. He held steady and plummeted feet first toward the rock.

Santos was only a few seconds behind him. Rip saw the corporal's tube flare and knew that everything was all right, at least for the moment, even though the asteroid was still a long way down.

He looked upward at the Connie cruiser and saw that it was moving. Its exhaust increased in length and deepened slightly in color as Rip watched, his forehead creased in a frown. What was the Connie up to?

Then he saw side jets flare out from the projecting control tubes and knew the ship was maneuvering. Rip realized suddenly that the cruiser was going to pick up the crippled assault boat.

He hadn't expected such a humane move after his first meeting with the Connie cruiser when the commander had been willing to sacrifice his own men. This time, however, there was a difference, he saw. The commander would lose nothing by picking up the assault boat, and he would save a few men. Rip supposed that manpower meant something, even to Consops.

His propulsion tube reached brennschluss, and for a few moments he watched, checking his speed and direction. Then, before he lit off another tube, he checked his chronometer. The illuminated dial registered 2301. They had just four minutes to get to the asteroid!

He spoke swiftly. "Waste no time in lighting off, Santos. That nuclear charge goes in four minutes!"

The Filipino corporal said merely, "Yessir."

Rip pulled a tube from his belt, held it overhead, and triggered it. His flight through space speeded up but he wasn't at all sure they would make it. He turned up his helmet communicator to full power and called, "Koa, can you hear me?"

The sergeant-major's reply was faint in his helmet. "I hear you weakly. Do you hear me?"

"Same way," Rip replied. "Get this, Koa. Don't fail to explode that charge at twenty-three-oh-five. Can you see us?"

The reply was very slightly stronger. "I will explode the charge as ordered, Lieutenant. We can see a pair of rocket exhausts, but no boats. Is that you?"

"Yes. We're coming in on propulsion tubes."

Koa waited for a long moment, then: "Sir, what if you're not with us by twenty-three-oh-five?"

"You know the answer," Rip retorted crisply.

Of course Koa knew. The nuclear blast would send Rip and Santos spinning into outer space, perhaps crippled, burned, or completely irradiated. But the lives of two men couldn't delay the blast that would save the lives of eight others, not counting prisoners.

Rip estimated his speed and course and the distance to the asteroid. He was increasingly sure that they wouldn't make it, and the knowledge was like the cold of space in his stomach. It would be close, but not close enough. A minute would make all the difference.

For a few heartbeats he almost called Koa and told him to wait that extra minute, to explode the nuclear charge at 2306, at the very last second. But even Planeteer chronometers could be off by a few seconds and he couldn't risk it. His men had to be given some leeway.

The decision made, he put his mind to the problem. There must be some way out. There must be!

He surveyed the asteroid. The nuclear charge was on his left side, pretty close to the sun line. At least he and Santos could angle to the right, to get as far away from the blast as possible.

The edge of the asteroid's shadow was barely visible. That it was visible at all was due to the minute particles of matter and gas that surrounded the sun, even millions of miles out into space. He reduced helmet power and told Santos, "Angle to the right. Get as close to the edge of shadow as you can without being cooked."

As an afterthought, he asked, "How many tubes do you have?"

"One after this, sir. I had three."

Rip also had one left. That was correct, because snapper-boats carried three in each man's position.

"Save the one you have left," he ordered.

He didn't know yet what use they would be, but it was always a good idea to have some kind of reserve.

The Connie cruiser was sliding up to the crippled assault boat. Rip took a quick look, then shifted his hands, and angled toward the edge of shadow. When he was within a few feet he reversed the direction of the tube to keep from shooting out into sunlight. A second or two later the tube burned out.

Santos was several yards away and slightly above him. Rip saw that the Planeteer was all right and turned his attention to the cruiser once more. It was close enough to the assault boat to haul it in with grappling hooks. The hooks emerged and engaged the torn metal of the boat, then drew it into the waiting port. The massive air door slid closed.

The question was, would the Connie try to set his ship down on the asteroid? Rip grinned without mirth. Now would be a fine time. His chronometer showed a minute and half to blast time.

He took another look at his own situation. He and Santos were getting close to the asteroid, but there was still over a half mile earth distance to go. They would cover perhaps three-fourths of that distance before Koa fired the charge.

He had a daring idea. How long could he and Santos last in direct sunlight? The effect of the sun in the open was powerful enough to make lead run like water. Their suits could absorb some heat and the ventilating system could take care of quite a lot. They might last as much as three minutes, with luck.

They had to take a risk with the full knowledge that the odds were against them. But if they didn't take the risk, the blast would push them outward from the asteroid-into full sunlight. The end result would be the same.

"We're not going to make it, Santos," he began.

"I know it, sir," Santos replied.

Rip thought, anyone with that much coolness and sheer nerve rated some kind of special treatment. And the Filipino corporal had shown his ability time and time again. He said, "I should have known you knew, Sergeant Santos. We still have a slight chance. When I give the word, use an air bottle to push you into the sunlight. When I give the word again, light off your remaining tube."

"Yessir," Santos replied. "Thank you for the promotion. I hope I live to collect the extra rating."

"Same here," Rip agreed fervently. His eyes were on his chronometer, and with his free hand he took another air bottle. When the chronometer registered exactly one minute before blast time, he called, "Now!" He triggered the bottle and moved from shadow into glaring sunlight. A slight motion of the bottle turned him so his back was to the sun, then he used the remaining compressed air to push him downward along the edge of shadow. The sun's gravity tugged at him.

He pulled the last tube from his belt and held it ready while he watched his chronometer creep around. With five seconds to go, he called to Santos and fired it. Acceleration pushed at him.

In the same moment, the nuclear charge exploded.



CHAPTER SIXTEEN - RIDE THE GRAY PLANET!

A mighty hand reached out and shoved Rip, sweeping him through space like a dust mote. He clutched his propulsion tube with both hands and fought to hold it steady.

He swiveled his head quickly, searching for Santos, and saw the Filipino a dozen rods away, still holding fast to his tube.

From the far horizon of the asteroid the incandescent fire of the nuclear blast stretched into space, turning from silver to orange to red as it cooled.

Rip knew they had escaped the heat and blast of the explosion, but there was a question of how much of the prompt radiation they had absorbed. During the first few seconds, a nuclear blast vomited gamma radiation and neutrons in all directions. He and Santos certainly had gotten plenty. But how much? Putting their dosimeters into a measuring meter aboard a cruiser would tell them. His low-level colorimeter had long since reached maximum red, and his high-level dosimeter could be read only on a measuring device.

Meanwhile, he had other worries. Radiation had no immediate effect. At worst, it would be a few hours before he felt any symptoms.

As he sized up his position and that of the asteroid, he let out a yell of triumph. His gamble would succeed! He had estimated that going into the direct gravity pull of the sun at the proper moment, and lighting off their last tubes, would put them into a landing position. The asteroid was swerving rapidly, moving into a new orbit that would intersect the course he and Santos were on. He had planned on the asteroid's change of orbit. In a minute at most they would be back on the rock.

His propulsion tube flared out and he released it. It would travel along with him, but his hands would be free. He watched closely as the asteroid drew nearer and estimated they would land with plenty of room to spare.

Then he saw something else. The blast had started the asteroid turning!

He reacted instantly. Turning up his communicator he yelled, "Koa! The rock is spinning! Cut the prisoners loose, grab the equipment, and run for it! You'll have to keep running to stay in the shadow. If sunlight hits those fuel tanks or the tubes of rocket fuel, they'll explode!"

Koa replied tersely, "Got it. We're moving."

The Planeteers and their prisoners would have to move fast, running to stay out of direct sunlight. A moment or two in the sun wouldn't hurt the men, but the chemical fuels in the cutting tanks and rocket tubes would explode in a matter of seconds.

At least the Connie cruiser couldn't harm them now, Rip thought grimly. He looked for the cruiser and failed to find it for several seconds. It had moved. He finally saw its exhausts some distance away.

He forgot his own predicament in a grin. The Connie cruiser had moved, but not because its commander had wanted to. It had been right in the path of the nuclear blast, although some distance from it. The Connie had been literally shoved away.

Then Rip forgot the cruiser. His suit ventilator was whining under the terrific heat and his whole body was bathed in perspiration. The sun was getting them. It was only a short time until the ventilator overloaded and burned out. They had to reach the asteroid before then. The trouble was, there was nothing further he could do about it. He had only air bottles left, and their blast was so weak that the effect wouldn't speed him up much. Nevertheless, he called to Santos and directed him to use his bottles. Then he did the same.

Santos spoke up. "Sir, we're going to make it."

In the same instant, Rip saw that they would land on the dark side. The asteroid was turning over and over, and for a second he had the impression he was looking at a turning globe of the earth, the kind used in elementary school back home. But this gray planet was scarcely bigger than the giant globe at the entrance of the Space Council building on Terra.

The gray metal world suddenly leaped into sharp focus and seemed to rush toward him. It was an optical illusion. The ability of the eyes to perceive depth sharply—the faculty known as depth perception—didn't appear to operate normally until the eyes were within a certain distance of an object.

He knew he was going to hit hard. The way to keep from being hurt was to turn the vertical energy of his arrival into motion in another direction. As he swept down to the metal surface he started running, his legs pumping wildly in space. He hit with a bone-jarring thud, lost his footing and fell sideways, both hands cradling his helmet. He got to his feet instantly and looked for Santos. A good thing his equipment was shock-mounted, he thought. Otherwise the communicator would be knocked for a line of galaxies.

"You all right, sir?" Santos called anxiously.

"Yes. Are you?"

"I'm fine. I think the others are over there." He pointed.

"We'll find them," Rip said. His hip hurt like fury from smashing against the unyielding metal, and the worst part was that he couldn't rub it. The blow had been strong enough to hurt through the heavy fabric and air pressure, but his hand wasn't strong enough to compress the suit. Just the same, he tried.

And while he was trying, he found himself in direct sunlight!

He had forgotten to run. Standing still on the asteroid meant turning with it, from darkness into sunlight and back again. He yelled at Santos and legged it out of there, moving in long, gliding steps. He regained the shadow and kept going.

The first order of business was to stop the rock from turning. Otherwise they couldn't live on it.

Rip knew that they had only one means of stopping the spin. That was to use the tubes of rocket fuel left over from correcting the course. They had three tubes left, but he didn't know if that was enough to do the job.

Moving rapidly, he and Santos caught up to Koa and the Planeteers.

The Connie prisoners were pretty well bunched up, gliding along like a herd of fantastic sheep. Their shepherds were Pederson, Nunez, and Dowst. The three Planeteers had a pistol in each hand. The spares were probably those taken from prisoners.

The Planeteers were loaded down with equipment. A few Connie prisoners carried equipment, too.

Trudeau had the rocket launcher and the remaining rockets. Kemp had his torch and two tanks of oxygen. Bradshaw had tied his safety line to the squat containers of chemical fuel for the torch and was towing them behind like strange balloons. The only trouble with that system, Rip thought, was that Bradshaw could stop, but the containers would have a tendency to keep going. Unless the English Planeteer were skillful, his burdens would drag him right off his feet.

Dominico had a tube of rocket fuel under each arm. The Italian was small and the tubes were bulky. Each was about ten feet long and two feet in diameter. With any gravity or air resistance at all, the Italian couldn't have carried even one.

Rip smiled as Dominico glided along. He looked as though the tubes were floating him over the asteroid, instead of the other way around.

Santos took the radiation detection instruments and the case with the astrogation equipment from Koa. Rip greeted his men briefly, then took his computing board and began figuring. He knew the men were glad he and Santos had made it. But they kept their greetings short. A spinning asteroid was no place for long and sentimental speeches.

He remembered the dimensions of the asteroid and its mass. He computed its inertia, then figured out what it would take to overcome the inertia of the spin.

The mathematics would have been simple under normal conditions, but doing them on the run, trying to watch his step at the same time, made things a little complicated. He had to hold the board under his arm, run alongside Santos while the new sergeant held the case open, select the book he wanted, open it and try to read the tables by his belt light and then transfer the data to the board.

His ventilator had quieted down once he got into the darkness, but now it started whining slightly again because he was sweating profusely. Finally he figured out the thrust needed to stop the spin. Now all he had to do was compute how much fuel it would take.

He had figures on the amount of thrust given by the kind of rocket fuel in the tubes. He also knew how much fuel each tube contained. But the figures were not in his head. They were on reference sheets.

He collected the data on the fly, slowing down now and then to read something, until a yell from Santos or Koa warned that the sun line was creeping close. When he had all data noted on the board, he started his mathematics. He was right in the middle of a laborious equation when he stumbled over a thorium crystal. He went headlong, shooting like a rocket three feet above the ground. His board flew away at a tangent. His stylus sped out of his glove like a miniature projectile, and the slide rule clanged against his bubble.

It happened so fast neither Koa nor Santos had time to grab him. The action had given him extra speed and he saw with horror that he was going to crash into Trudeau. He yelled, "Frenchy! Watch out!" Then put both hands before him to protect his helmet. His hands caught the French Planeteer between the shoulders with a bone-jarring thud.



CHAPTER SEVENTEEN - THE ARCHER AND THE EAGLE

Trudeau held tight to the launcher, but the rocket racks opened and spilled attack rockets into space. They flew in a dozen different directions. Trudeau gave vent to his feelings in colorful French.

Koa and Santos laughed so hard they had trouble collecting the scattered equipment. Rip, slowed by his crash with Trudeau, got his feet under him again.

The asteroid had turned into the sun before they collected everything but Rip's stylus and five attack rockets. The space-pencil was the only thing that could write on the computing board. It had to be found.

"Next time around," Rip called to the others, and led the way full speed ahead until they regained the safety of shadow.

Rip suspected the stylus was somewhere above the rock and probably wouldn't return to the surface for some minutes. While he was wondering what to do, there was a chorus of yells. A rocket sped between the Planeteers and shot off into space.

"Our own rockets are after us," Trudeau gasped. There hadn't been time to collect them all after Rip's unwilling attack on the Frenchman scattered them. Now the sun was setting them off. Another flashed past, fortunately over their heads. The sun's heat was causing them to fire unevenly. Rip hoped they would all go off soon and get it over with.

"Three more to go," Koa called. "Watch out!"

Only two went, and they were far enough away to offer no danger.

Santos had been fishing around in the instrument case. He triumphantly produced another stylus. "It was under the sextant," he explained. "I thought there was another one around somewhere."

"If we get through this I'll propose you for ten more stripes," Rip vowed. "We'll make you the highest ranking sergeant that ever made a private's life miserable."

Working slowly but more safely, Rip figured that slightly more than two and a half tubes would do the trick.

Now to fire them. That meant finding a thorium crystal properly placed and big enough. There were plenty of crystals, so that was no problem. The next step was for Kemp to cut holes with his torch, so that the thrust of the rocket fuel would be counter to the direction in which the asteroid was spinning.

Rip explained to all hands what had to be done. The burden would fall on Kemp, who would need a helper. Rip took that job himself. He took one oxygen tank from Kemp. Koa took the other, leaving the torchman with only his torch.

Then Rip took a container of chemical fuel from Bradshaw. Working while running, he lashed the two containers together with his safety line. Then he improvised a rope sling so they could hang on his back. He wanted his hands free.

Kemp, meanwhile, assembled his torch and put the proper cutting nozzle in place. When he was ready, he moved to Rip's side and connected the hoses of the torch to the tanks the lieutenant carried. Kemp had the torch mechanism strapped to his own back. It was essentially a high pressure pump that drew oxygen and fuel from the tanks and forced them through the nozzle under terrific pressure.

When he had finished, he pressed the trigger that started the cutting torch going. The fuel ignited about a half inch in front of the nozzle. The nozzle had two holes in it, one for oxygen and the other for fuel. The holes were placed and angled to keep the flame always a half inch away, otherwise the nozzle itself would melt.

"How do we work this?" Kemp asked.

"We'll get ahead of the others," Rip explained. "Keep up speed until we're running at the forward sun line. Then, when the crystal we want comes around into the shadow, we can stop running and work until it spins into the sunshine again."

"Got it," Kemp agreed.

Rip estimated the axis on which the asteroid was spinning and selected a crystal in the right position. He had to be careful, otherwise their counter-blast might do nothing more than start the gray planet wobbling.

He and Kemp ran ahead of the others. The Planeteers and their prisoners were running at a speed that kept them right in the middle of the dark area.

It was like running on a treadmill. The Planeteers were making good speed, but were actually staying in the same place relative to the sun's position, keeping the turning asteroid between them and the sun.

Rip and Kemp ran forward until they were right at the sun line. Then they slowed down, holding position and waiting for the crystal they had chosen to reach them. As it came across the sun line into darkness they stopped running and rode the crystal through the shadow until it reached the sun again. Then the two Planeteers ran back across the dark zone to meet the crystal as it came around again. There was only a few minutes' working time each revolution.

Kemp worked fast, and the first hole deepened. Rip helped as best he could by pushing away the chunks of thorium that Kemp cut free, but it was essentially a one-man job.

As Kemp neared the bottom of the first hole, Rip reviewed his plan and realized he had overlooked something. These weren't nuclear bombs; they were simple tubes of chemical fuel. The tubes wouldn't destroy the hole Kemp was cutting.

He reached a quick decision and called Koa to join them. Koa appeared as Kemp pulled his torch from the hole and started running again to avoid the sun. Rip and Koa ran right along with him, crossing the dark zone to meet the crystal as it came around again.

"There's no reason to drill three holes," Rip explained as they ran. "We'll use one hole for all three charges. They don't have to be fired all at once."

"How do we fire them?" Koa asked.

"Electrically. Who has the exploders and the hand dynamo?"

"Dowst has the exploders. One of the Connies is carrying the dynamo."

Speaking of the Connies ... Rip hadn't seen the Consops cruiser recently. He looked up, searching for its exhaust, and finally found it, a faint line some distance away.

The Connie commander was stalemated for the time being. He couldn't land his cruiser on a spinning asteroid, and he had no more boats. Rip thought he probably was just waiting around for any opportunity that might present itself.

The Federation cruisers should be arriving. He studied his chronometer. No, the nearest one, the Sagittarius from Mercury, wasn't due for another ten minutes or so. He turned up his helmet communicator and ordered all hands to watch for the exhaust of a nuclear drive cruiser, then turned it down again and gave Koa instructions.

"Have Trudeau turn his load over to a Connie and collect the exploders and the dynamo. We'll need wire, too. Who has that?"

"Another Connie."

"Get a reel. Cut off a few hundred feet and connect the dynamo to one end and an exploder to the other."

The crystal came around again and Kemp got to work. Rip stood by, again reviewing all steps. They couldn't afford to make a mistake. He had no margin of error.

Kemp finished the hole a few seconds before the crystal turned into the sunlight again. Rip told him to keep the torch going. There might be some last minute cutting to do. Then the lieutenant hurried off at an angle to where Dominico was plodding along with the fuel tubes.

Koa had turned the tube he carried over to a Connie. Rip got it, and told Dominico to follow him. Then he angled back across the asteroid to where Kemp was holding position.

The asteroid turned twice before Koa arrived. He had a coil of wire slung over his arm and he carried the dynamo in one hand and an exploder in the other, the two connected by the wire.

Rip took the exploder. "Uncoil the wire," he directed. "Go to its full length at right angles to the hole. We have to time this exactly right. When the crystal comes around again, I'll shove the tube into the hole, then scurry for cover. When I'm clear I'll yell and you pump the dynamo. Dominico and Kemp stay with Koa. Make sure no one is in the way of the blast."

Koa unreeled the wire, moving away from Rip. The lieutenant pushed the exploder into one end of the fuel tube and crimped it tightly with his gloved hand.

Koa and the others were as far away as they could get now, the wire stretching between them and Rip. Kemp had made sure no one was running near the line of blast.

Rip watched for the crystal. It would be coming around any second now. He held the tube with the exploder projecting behind him, ready for the hole to appear.

Koa's voice echoed in his helmet. "All set, Lieutenant."

"So am I," Rip answered. "Stand by."

The crystal appeared across the sun line and moved toward him. He met it, slowed his speed, put the end of the tube into the hole and shoved. Kemp had allowed enough clearance. The tube slid into place. Rip turned and angled off as fast as he could glide. When he was far enough away from the blast line he called, "Fire!"



"Fire!" Called Rip

Koa squeezed the dynamo handle. The machine whined and current shot through the wire. A column of orange fire spurted from the crystal.

Rip watched the stars instead of the exhaust. He kept running as it burned soundlessly. In air, the noise would have deafened him. In airless space, there was nothing to carry the sound.

The apparent motion of the stars was definitely slowing. The spinning wouldn't cease entirely, but it would slow down enough to give them more time to work.

The tube reached brennschluss and Rip called orders. "Same process. Get ready to repeat. Dominico, bring one of your tubes."

While Koa was connecting another exploder to the wire, Rip took a tube from Dominico. "Take your space knife and saw through the tube you have left. We'll need about three-fifths of it. Keep both pieces."

Dominico pulled his knife, pressed the release, and the gas capsule shot the blade out. He got to work.

Koa called that he was ready. Rip took the wired exploder from him and thrust it into the tube Dominico had given him.

As the crystal came around again, the process was repeated. The hole was undamaged.

There was more time to get clear because of the asteroid's slower speed. The second tube slowed the rock even more, so that they had to wait long minutes while the crystal came around again.

Rip did some estimating. He wanted to be sure the next charge would do nothing more than slow the asteroid to a stop. If the charge were too heavy, it would reverse the spin. He didn't want to make a career of running on the asteroid. He was tired and he knew his men were getting weary, too. He could see it in their strides—they were less sure oL foot.

He decided it would be best to use a little less fuel rather than a little more. If the asteroid failed to stop its spin completely, they could always set off a small charge or two.

"Hold it," he ordered. "We'll use the small end of Dominico's tube and save the big one."

The fuel was a solid mass, so cutting the tube in two sections caused no difficulty. Rip pushed the exploder into the small section, seated it in the hole, and hurried to cover. As he watched the fuel burn, he wondered why the last nuclear charge had started the spin. He had made a mistake somewhere. The earlier blasts had been set so they wouldn't cause a spin. He made a mental note to look at the place where the charge had exploded when things were more quiet.

The rocket fuel slowed the asteroid down to a point where it was barely turning, and Rip was glad he had been cautious. The heavier charge would have reversed it a little. He directed the placing of a very small charge and was moving away from it so Koa could set it off when Santos suddenly yelled, "Sir! The Connie is coming!"

Rip called, "Fire the charge, Koa," then looked up. The Consops cruiser was moving slowly toward them. The canny Connie had been waiting for something to happen on the asteroid, Rip guessed. When the spinning slowed and then stopped, the Connie probably had decided that now was the time for a final try.

"Where is the communicator?" Rip asked Koa.

"One of the Connies has it."

"Get it. I'll notify Terra base of what happened."

Koa found the Connie with the communicator, tested it to be sure the prisoner hadn't sabotaged it, and brought it to Rip.

"This is Foster to Terra base. Over."

"Come in, Foster."

Rip explained briefly what had happened and asked, "How is our orbit? I haven't had time to take sightings."

"You're free of the sun," Terra base answered. "Your orbit will have to be corrected sometime within the next few hours. The last blast pushed you off course."

"That's a small matter," Rip stated. "Unless we can think of something fast, this will be a Connie asteroid by then. The Consops cruiser is moving in on us. He's careful, because he isn't sure of the situation. But even at his present speed he'll be here in ten minutes."

"Stand by." Terra base was silent for a few moments, then the voice replied. "I think we have an answer for you, Foster. Terra base off. Go ahead, MacFife."

A Scottish burr thick enough to saw boards came out of the communicator. "Foster, this is MacFife, commander of the Aquila. Y'can't see me on account of I'm on yer sunny side. But, lad, I'm closer to ye than the Connie. We did it this way to keep the asteroid between us and him. Also, lad, if ye'll take a look up at Gemini, ye'll see somethin' ye'll like. Look at Alhena, in the Twins' feet. Then, lad, if ye'll be patient the while, ye'll have a grandstand seat for a real big show."

Rip tilted his bubble back and stared upward at the constellation of the twins. He said softly, "By Gemini!" For there, a half degree south of the star Alhena, was the clean line of a nuclear cruiser's exhaust. The Sagittarius, out of Mercury, had arrived.

He cut the communicator off for a moment and spoke exultantly to his men. "Stand easy, you hairy Planeteers. Forget the Connie. He doesn't know it, but he's caught. He's caught between the Archer and the Eagle!"



CHAPTER EIGHTEEN - COURTESY - WITH CLAWS

Sagittarius, constellation of the Archer, and Aquila, constellation of the Eagle, had given the two Federation patrol cruisers their names. The Eagle was commanded by a tough Scotsman, and the Archer by a Frenchman.

Commander MacFife spoke through the communicator. "Switch bands to universal, lad. Me'n Galliene are goin' to talk this Connie into a braw mess. MacFife off."

Rip guessed that the two cruiser commanders had been in communication while enroute to the asteroid and had cooked up some kind of plan. He turned the band switch to the universal frequency with which all long-range communicators were equipped. Each of the earth groups had its own frequency, and so did the Martians and Jovians. But all could meet and talk on the universal band.

Special scrambling devices prevented eavesdropping on regular frequencies, so there was no danger that the Connie had overheard the plan. Rip wondered what it was. He knew the cruisers had to be careful not to cross the thin line that might lead to war.

The Sagittarius loomed closer, decelerating with a tremendous exhaust. The Connie couldn't have failed to see it, Rip knew. He was right. The Consops cruiser suddenly blasted more heavily, rushing in the direction away from the Federation ship. The direction was toward the asteroid.

And at the same moment, the Aquila flashed above the horizon, also decelerating. The Connie was caught squarely.

A suave voice spoke on the universal band. "This is Federation SCN Sagittarius, calling the Consolidation cruiser near the asteroid. Please reply."

Rip waited anxiously. The Connie would hear, because every control room monitored the universal band.

A heavy, reluctant voice replied after a pause of over a minute.

"This is Consolidation cruiser Sixteen. You are breaking the law, Sagittarius. Your missile ports are open and they are pointing at me. Close them at once or I will report this."

The suave voice with its hint of French accent replied, "Ah, my friend! Do not be alarmed. We have had a slight accident to our control circuit and the ports are jammed open. We are trying to repair the situation. But I assure you, we have only the friendliest of intentions."

Rip grinned. This was about the same as a man holding a cocked pistol at another man's head and assuring him it was nothing but a nervous arm that kept the gun so steady.

The Connie demanded, "What do you want?"

The two friendly cruisers were within a few miles of the Connie now and their blasts were just strong enough to keep them edging closer, while counteracting the sun's pull.

The French spaceman spoke reassuringly. "My friend, we want only the courtesy of space to which the law entitles us. We have had an unfortunate accident to our astrogation instruments, and we wish to come aboard to compare them with yours."

Rip laughed outright. Every cruiser carried at least four full sets of instruments. There was as much chance of all of them being knocked off scale at once as there was of his biting a cruiser in half with bare teeth.

MacFife's voice came on the air. "Foster. Switch to Federation frequency."

Rip did so. "This is Foster, Commander."

"Lad, it's a pity for ye to miss the show. I'm sending a boat for ye."

"The sun will get it!" Rip exclaimed.

"Never fear, lad. It won't get this one. Now switch back to universal and listen in."

Rip did so in time to catch the Connie commander's voice. "... and I refuse to believe such a story! Great Cosmos, do you think I am a fool?"

"Of course not," the Frenchman replied. "You are not such a fool as to refuse a simple request to check our instruments."

The Sagittarius commander was right. Rip understood the strategy. Equipment sometimes did go out of operation in space, and Connies had no hesitation in asking Federation cruisers for help, or the other way around. Such help was always given, because no commander could be sure when he might need help himself.

"I agree," the Connie commander said with obvious reluctance. "You may send a boat."

MacFife's Scotch burr broke in. "Federation SCN Aquila to Consolidation Sixteen. Mister, my instruments are off scale, too. I'll just send them along to ye and ye can check them while ye're doing the Sagittarius!"

"I object!" the Connie bellowed.

"Come now," MacFife burred soothingly. "Checking a few instruments won't hurt ye."

A small rocket exhaust appeared, leaving the Aquila. The exhaust grew rapidly, more rapidly than that of any snapper-boat. Rip watched it, while keeping his ears tuned to the space conversation.

Koa tugged his arm. "See that, sir?"

Rip nodded.

"Surely sending boats is too much of a nuisance," the French commander said winningly. "We will come alongside."

"It's a trick," the Connie growled. "You want me to open my valves, then your men will board us and try to take over my ship!"

"My friend, you have a suspicious mind," Galliene replied smoothly. "If you wish, arm your men. Ours will have no weapons. Train launchers on the valves so our men will be annihilated before they can board, if you see a single weapon."

This was going a little far, Rip thought, but it was not his affair and he didn't know exactly what MacFife and Galliene had in mind.

The Aquila's boat arrived with astonishing speed. Rip saw it flash in the sunlight and knew he had never seen one like it before. It was a perfect globe, about 20 feet in diameter. Blast holes covered the globe at intervals of six feet.

The boat settled to the asteroid and a new voice called over the helmet circuit, "Where's Foster? Show an exhaust! We're in a rush."

Rip ordered, "Take over, Koa. I'll be back."

"Yessir."

He hurried to the boat and stood there, bewildered. He didn't know how to get in.

"Up here," the voice called. He looked up and saw a hatch. He jumped and a space-clad figure pulled him inside. The door shut and the boat blasted off. Acceleration shoved him backward, but the spaceman snapped a line to his belt, then motioned him to a seat. Rip pulled himself up the line and got into the seat, snapping the harness in place.

"I'm Hawkins, senior space officer," the spaceman said. "Welcome, Foster. We've been losing weight wondering if we'd get here in time."

"I was never so glad to see spacemen in my life," Rip said truthfully. "What kind of craft is this, sir?"

"Experimental," the space officer answered. "It has a number, but we call it the ball-bat because it's shaped like a ball and goes like a bat. We were about to take off for some test runs around the space platform when we got a hurry call to come here. The Aquila has two of these. If they prove out, they'll replace the snapper-boats. More power, greater maneuverability, heavier weapons, and they carry more men."

There was only the officer and a pilot, but Rip saw positions for several others.

He looked out through the port and saw the two Federation cruisers closing in on the Connie. Apparently the Connie commander had agreed to let the cruisers come alongside.

The ball-bat blasted to the Aquila, paused at an open port, then slid inside. The valve was shut before Rip could unbuckle his harness. Air flooded into the chamber and the lights flicked on. The space officer gave Rip a hand out of the harness, and the young Planeteer went through the hatch to the deck.

The inner valve opened and a lean, sandy-haired officer in space blue with the insignia of a commander stepped through. Grinning, he hurried to Rip's side and twisted his bubble, lifting it off.

"Hurry, lad," he greeted Rip. "I'm MacFife. Get out of that suit quick, because ye don't want to miss what's aboot to happen." With his own hands he unlocked the complicated belt with its gadgets and equipment, disconnected the communicator and ventilator, and then unfastened the lock clips that held top and bottom of the suit together.

Rip slipped the upper part over his head and stepped out of the bottom. "Thanks, Commander. I'm one grateful Planeteer, believe me!"

"Come on. We'll hurry right across ship to the opposite valve. Lad, I've a son in the Planeteers and he's just about your own age. He's on Ganymede. He and the others will be proud of what ye've done."

MacFife was pulling himself along rapidly by the convenient handholds. Rip followed, his breathing a little rapid in the heavier air of the ship. He followed the Scottish commander through the maze of passages that crossed the ship and stopped at a valve where spacemen were waiting. With them was an officer who carried a big case.