At the top, the night was clear as crystal. He was standing on a beach of ice that shelved down from his feet into a lake of cotton wool. On the opposite shore of the lake rose the summits of the rock buttresses and ice cliffs that stood beyond the base. For miles around, ghostly white bergs of Ganymedean ice floated on an ocean of cloud, shining against the blackness of the night.

But there was no Sun.

He raised his eyes, and gasped involuntarily. Above him, five times larger than the Moon seen from Earth, was the full disk of Jupiter. No photograph he had ever seen, or any image reproduced on a display screen, could compare with the grandeur of that sight. It filled the sky with its radiance. All the colors of the rainbow were woven into its iridescent bands of light, stacked layer upon layer outward from its equator. They faded as they approached its edge and merged into a hazy circle of pink that encircled the planet. The pink turned to violet and finally to purple, ending in a clear, sharp outline that traced an enormous circle against the sky. Immutable, immovable, eternal . . . mightiest of the gods—and tiny, puny, ephemeral man had crawled on a pilgrimage of five hundred million miles to pay homage.

Maybe only seconds passed, maybe hours. Hunt could not tell. For a fraction of eternity he stood unmoving, a speck lost among the silent towers of rock and ice. Charlie too had stood upon the surface of a barren waste and gazed up at a world wreathed in light and color—but the colors had been those of death.

At that moment, the scenes that Charlie had seen came to Hunt more vividly than at any time before. He saw cities consumed by fireballs ten miles high; he saw gaping chasms, seared and blackened ash that had once held oceans, and lakes of fire where mountains had stood. He saw continents buckle and break asunder, and drown beneath a fury of white heat that came exploding outward from below. As clearly as if it were really happening, he saw the huge globe above him swelling and bursting, grotesque with the deceptive slowness of mighty events seen from great distances. Day by day it would rush outward into space, consuming its moons one after the other in an insatiable orgy of gluttony until its force was spent. And then . . .

Hunt snapped back to reality with a jolt.

Suddenly the answer he had been seeking was there. It had come out of nowhere. He tried to trace its root by backtracking through his thoughts—but there was nothing. The pathways up from the deeper levels of his mind had opened for a second, but now were closed. The illusion was exposed. The paradox had gone. Of course nobody had seen it before. Who would think to question a truth that was self-evident, and older than the human race itself?