Naturally, it had not been expected that the satellites would have to be brought down by command from the ground. But this, too, was part of the careful planning--radio control of the retro-rockets that move the satellite out of orbit by reducing its velocity. Of course, ground control was to be used only if the astronaut failed to ignite the retro-rockets himself. He remembered everyone's surprise and relief when the first capsule was recovered and its occupant found to be alive. They had assumed that in spite of all precautions he was dead because he had not fired the rockets on the fiftieth orbit and it was necessary to bring him down on the sixty-fifth. Recovery alive only partially solved the mystery, for the rescuers and all others were met by a haughty, stony silence from the occupant. Batteries of tests confirmed an early diagnosis: complete and utter withdrawal; absolute refusal to communicate. Therapy was unsuccessful. * * * * * The second attempt was similar in most respects, except that command return was made on the thirty-first orbit after the astronaut's failure to de-orbit at the end of the thirtieth. His incoherent babble of moons, stars, and worlds was no more helpful than the first. Test after test confirmed that no obvious organic damage had been incurred by exposure outside of the Earth's protective atmosphere. Biopsy of even selected brain tissues seemed to show that microscopic cellular changes due to prolonged weightlessness or primary cosmic-ray bombardment, which had been suggested by some authorities, were unimportant. Somewhat reluctantly, it was decided to repeat the experiment a third time. The launching was uneventful. He was sent into space with the precision he expected. The experience was exhilarating and, although he had anticipated each event in advance, he could not possibly have foreseen the overpowering feeling that came over him. Weightlessness he had experienced for brief periods during training, but nothing could match the heady impression of continuous freedom from gravity. Earth passing overhead was also to be expected from the simple laws of celestial mechanics but his feeling as he watched it now was inexpressible. It occurred to him that perhaps this was indeed why he was here, because he could appreciate such experiences best. He had been told the stars would be bright, unblinking, and an infinitude in extent, but could mere descriptions or photographs convey the true seeing?