Immediately, it was wrapped in an envelope of incandescent gas, and radio contact was lostThere were anxious minutes of waiting,for the two watchers on the…

Then the camera caught,a glimpse of something very strangeMany miles away, the golden landscape reared itself into a curiously symmetrical cone, like a…

From Capricorn to Cancer enclosed a slowly rotating drum, thirty-five feet in diameterAs it made one revolution every ten seconds, this carrousel or centrifuge produced an artificial gravity equal to that of the MoonThis was enough to prevent the physical atrophy which would result from the complete absence of weight, and it also allowed the routine functions of living to be carried out under normal or nearly normal conditions.…

His decision had been right; that very refusal to specialize had made him uniquely qualified for his present taskIn much the same way Frank Poole who sometimes disparagingly called himself General Practitioner in space biology had been an ideal choice as his deputyThe two of them, with, if necessary, help from Hal's vast stores of information, could cope with any problems likely to arise during the voyage as long as they kept their minds alert and receptive, and continually reengraved old…