Man Is About To Conquer Space -- This drawing illustrates the make-up of skies and some problems which face man in conquest of space. At the moment, man is so close to breaking the fetters that have bound him to earth for a million years, that a symposium of scientists sponsored by the U.S. Air Force School of Aviation Medicine will be held Tuesday at San Antonio, Tex. The subject will be the upper atmosphere and aeropause-that zone at 80 miles altitude where air is so thin it trails off into em