 Sensatia most likely refers to ________.
[Transcriber's Note: This etext was produced from Galaxy Science Fiction November 1951. Rootless and footloose, a man in space can't help but dream of coming home. Flight Officer Robert Craig surrendered the tube containing his service record tapes and stood waiting while the bored process clerk examined the seal. He felt anxiety as the much-handled card refused for a time to match the instrument's metal contact points. "No specific destination," supplied the man as he punched a key on a small instrument, "Air-lock ahead and to your right. The knowledge that much of it was motivated by envy soothed him as he clumsily let himself into the lock. "No, but my father—" "Your parents left Terra during the Second Colonization of Cassiopeia II, didn't they?" He was uncomfortable; Wyandotte seemed to know all about him. "Oh, I've landed a few times, even walked around for a while...." Short of Gravitational conditioning, there is nothing to stop you from going to Terra." Your body is conditioned to a normal state of free fall, or at best to a state of acceleration." "You were ill, couldn't keep your balance, felt dizzy. It helps suppress certain physiological reactions to an entirely new set of conditions. They play an important part in our awareness of balance. Without gravity they act up for a time, then gradually lose function. Returning to gravity is rather frightening at first." And yet the man could not be pinned down to any specific condition the spaceman would find intolerable. He had weathered difficult landings on worlds with rip-tide gravities, had felt the pull of the incredible star-tides imparted by twin and even triple star systems. He had been on Einstein IV, the planet of eight moons, and had felt the pulse of all eight of the satellites at once that no PON could completely nullify. But even if he could accept the psychologist's authority for the cumulative effect of a gravity system, he could not understand the unspoken warning he felt underlying all that the man said. You agreed that you could not decide that for me and that my decision is logical. You tell me spacemen don't settle down on Terra. "Mr. Craig," the psychologist said slowly, "you have my authorization for you to return to Terra as a private citizen of that planet. On the eighth day, two attendants, who showed the effects of massive doses of PON to protect themselves from the centrifugal force, had to carry a man out of the tank.
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