The Sentinel - Arthur C. Clarke [16]
Alveron started up.
“Do you imagine that there might be an outer planet that hasn’t been reported?” he asked. “If so, your theory’s certainly wrong. The beam wasn’t even pointing in the plane of the Solar System. And even if it were —just look at this.”
He switched on the vision screen and adjusted the controls. Against the velvet curtain of space was hanging a blue-white sphere, apparently composed of many concentric shells of incandescent gas. Even though its immense distance made all movement invisible, it was clearly expanding at an enormous rate. At its center was a blinding point of light—the white dwarf star that the sun had now become.
“You probably don’t realize just how big that sphere is,” said Alveron. “Look at this.”
He increased the magnification until only the center portion of the nova was visible. Close to its heart were two minute condensations, one on either side of the nucleus.
“Those are the two giant planets of the system. They have still managed to retain their existence—after a fashion. And they were several hundred million miles from the sun. The nova is still expanding—but it’s already twice the size of the Solar System.”
Rugon was silent for a moment.
“Perhaps you’re right,” he said, rather grudgingly. “You’ve disposed of my first theory. But you still haven’t satisfied me.”
He made several swift circuits of the room before speaking again. Alveron waited patiently. He knew the almost intuitive powers of his friend, who could often solve a problem when mere logic seemed insufficient.
Then, rather slowly, Rugon began to speak again.
“What do you think of this?” he said. “Suppose we’ve completely underestimated this people? Orostron did it once—he thought they could never have crossed space, since they’d only known radio for two centuries. Hansur II told me that. Well, Orostron was quite wrong. Perhaps we’re all wrong. I’ve had a look at the material that Klarten brought back from the transmitter. He wasn’t impressed by what he found, but it’s a marvelous achievement for so short a time. There were devices in that station that belonged to civilizations thousands of years older. Alveron, can we follow that beam to see where it leads?”
Alveron said nothing for a full minute. He had been more than half expecting the question, but it was not an easy one to answer. The main generators had gone completely. There was no point in trying to repair them. But there was still power available, and while there was power, anything could be done in time. It would mean a lot of improvisation, and some difficult maneuvers, for the ship still had its enormous initial velocity. Yes, it could be done, and the activity would keep the crew from becoming further depressed, now that the reaction caused by the mission’s failure had started to set in. The news that the nearest heavy repair ship could not reach them for three weeks had also caused a slump in morale.
The engineers, as usual, made a tremendous fuss. Again as usual, they did the job in half the time they had dismissed as being absolutely impossible. Very slowly, over many hours, the great ship began to discard the speed its main drive had given it in as many minutes. In a tremendous curve, millions of miles in radius, the S9000 changed its course and the star fields shifted round it.
The maneuver took three days, but at the end of that time the ship was limping along a course parallel to the beam that had once come from Earth. They were heading out into emptiness, the blazing sphere that had been the sun dwindling slowly behind them. By the standards of interstellar flight, they were almost stationary.
For hours Rugon strained over his instruments, driving his detector beams far ahead into space. There were certainly