forever, as sleepless as Athena, while there was still work to be done and decisions to be made.
Tragedy had snowballed into disaster; what had now happened could be far more serious than the loss of Whitehead. Poole 's death might be another accident, or a piece of sheer bad luck that would never occur again. But if something was fundamentally wrong with the revival process, his sleeping shipmates were already doomed. And he with them; for he could not handle Discovery alone, when the time came to steer her into her final orbit.
This was not a situation anyone had been pessimistic enough to imagine; no procedure had been laid down to deal with it. When some utterly unexpected problem arose, his orders were to consult with Earth, if time permitted. He had the time; no one had ever dreamed that he would lack the ability. For if any part of the radio equipment failed, it could always be repaired or replaced; the only item that had not been duplicated, because of its size and weight, was the antenna assembly. Who would have imagined that anything could ever demolish that system, short of wrecking the ship itself? It was not, in the jargon of the designers, a credible accident; but it had occurred.
The loss of the antenna had not only made it impossible to obtain medical advice from Earth; it had endangered the whole purpose of the mission. Whatever they might discover when they reached Jupiter, they would have no way of reporting it home.
There was one slim chance of saving the situation. The antenna was not many miles distant and traveling away from the ship at a relatively low speed. He might be able to retrieve it and effect temporary repairs; even if he could not do so, perhaps Kimball and the others would succeed-as long as he recaptured the lost equipment before it was forever out of reach.
He took careful measurements of speed and velocity with the ship's radar, then made estimates of the mass that was now drifting away into space. He fed the information into Athena, set up the problem, and watched the answer flash on the display before he could even lift his finger from the keys.
Yes, a fully fueled and provisioned pod could do it, if he acted now and if everything went smoothly. But time was fast running out; the chance of success diminished with every passing minute. If he did not leave within the next few hours, the operation would be impossible.
Like most space missions, it involved subtle trade-offs between time and speed and payload, and the answer was not at all obvious. Merely to get to the drifting antenna was easy enough; the pod could make the round trip in four or five hours-if it had nothing else to do. But Bowman had to hold in reserve a substantial portion of his total fuel for the task of slowing down the runaway equipment, and then turning it back toward the ship. This drastically reduced the overall performance of his little vehicle, by limiting the speed it could obtain. The outward trip would take five hours, the return run another five– and the capsule carried oxygen for only twelve hours.
Two hours to grapple the antenna and reverse its velocity; that seemed an adequate margin of time, though he would have preferred more. He was well aware of the risks, but they were not so great that a reasonable man would be deterred by them. Whitehead's mishap would not occur again in a million hours of operational time; the worst dangers were those of carelessness, for space was pitilessly unforgiving of mistakes. And though he would be leaving the ship without a human watcher at the controls, Athena could handle the situation. If he did not come back, in a few hours she would awaken the next man. He was not endangering his sleeping colleagues; indeed, he was increasing their chances of life, and of completing the mission successfully.
When he had satisfied himself that there was no flaw in his logic, he entered his decision in the log. Then, swiftly but conscientiously, he made his preparations to leave the ship. He was not going alone, for he had a second task to perform.
He had also to consign Kelvin Poole to the deeps of space.
Space capsule Alice hung in the airlock, holding her somber cargo in her mechanical arms like a robot Pieta. Bowman had checked and double-checked her systems: he was ready to go.
'Mary Sarah Alice,' he ordered Athena. 'Pumping sequence start.'
'Mary Sarah Alice,' Athena should have echoed. 'Pumping sequence start.' But she did nothing of the sort.
Her immediate response was a sound that Bowman had never heard before, except during practice runs. It was a high-pitched PING-PING-PING, completely distinctive and quite unmistakable. He knew exactly what it meant, but in case he had forgotten, Athena reminded him.
'Order violates Directive Fifteen,' she said. 'Please cancel or amend.'
Bowman cursed silently. It was no good arguing with Athena, she had her instructions-her built-in laws-and she would obey them. This was something he should have remembered, and the error was alarming, though understandable in the circumstances. He was very tired and under a great strain; what else might he also have forgotten?
He could not leave the ship, if there was no deputy commander to take over from him. Athena knew the present state of affairs; it was no use trying to fool her. She would not let him go-and, without her cooperation, he could not even open the airlocks.
It was a maddening situation, and illustrated perfectly the lack of initiative shown by even the most advanced computers. He had spent almost an hour with Athena analyzing this mission, and not once had she reminded him that he could not carry it out….
The captain of the Discovery was a stubborn man, particularly when he was frustrated. He looked at his chronometer; there was still plenty of time. Then, angry at Athena and at himself, yet coolly determined on his plan of action, he climbed out of the capsule, shucked off his spacesuit, and returned to the Control Deck.
The laws governing Athena's behavior were not inviolable; like any computer, she could be reprogrammed. But this was a skilled job, and it took time. When Bowman had consulted the logic diagrams, decided which steps could be cut out, checked that he had not introduced undesired side-reactions, run the new program through several times, and corrected a number of trivial mistakes, he had wasted more than an hour. Yet this was one operation that certainly could not be hurried; if the revised program was faulty, Athena might let him out of the ship-but she might not allow him to return.
Before he left the Control Center , he checked the position of the drifting antenna once more, both visually and by radar. It was now considerably further away, and when he recomputed the mission he was alarmed to find that he would have only about an hour of working time when he caught up with the runaway hardware. But that should be sufficient, all he had to do was to make contact with the antenna and push it gently back toward the ship. It seemed a straightforward enough operation, and he did not anticipate any difficulty.
There were no protests from Athena, and no further delays in the airlock. At his command, the door swung open into space.
Like a tiny, complex toy, surrounded by stars and the distant glow of the Milky Way, Discovery hung in space between Mars and Jupiter. She seemed absolutely motionless, not even rotating, but in reality she was still leaving the Sun at almost a million miles a day. The tiny, shrunken Sun, whose pale rays had long lost the power of bringing warmth.
One might have watched the ship for hours, even for days, and seen no sign of life. Yet now a black circle had appeared in the hull, as a door swung out into nothingness. From that circle slowly emerged the glittering, ungainly shape of a space capsule. Bowman and Poole were leaving Discovery.
With great difficulty Bowman had sealed Poole into his suit, for he did not wish to see the transformation which the body of an unprotected man undergoes in a vacuum. It was an extremely expensive coffin, this armor that had been built to guard him in life. But it was of no use to anyone else; it had been tailored to fit Poole , and now would perform this last service for him.
He set the timer for a five-second burst, and punched the firing key. With a faint hiss, the jet burst into life; he felt the momentary surge of weight as the pod's seat pressed against him with its fifth-of-a-gee acceleration. Then it was over-but he was moving away from Discovery at twenty miles an hour.
For one horrible instant, it seemed that the metal hands of the space pod had become entangled in the harness of the suit, but he managed to get them loose. Then the body was floating beside him, no longer in contact, but still sharing his speed as they both drifted away from the ship.
And now Kelvin Poole was following the road along which Peter Whitehead had already traveled. Both of them, in strange and literal truth, were on their way to the stars. For they were moving fast enough to escape from the Solar System; though they would sweep past Jupiter, even its giant gravity could never capture them. They would sail onward through the silence, passing the orbits of the outer planets one by one; and only then would their journey really begin-a journey that would never end, and might outlast Earth itself.
