Word: earthborn
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Dates: during 1920-1929
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...object of Herr Oberth's researches. The Society considered that he had actually made progress toward ''practical interstellar navigation." The problem begins, and so far has ended, with the forces by which Earth clutches that which is its own. To escape the pull of gravity, an earthborn body would have to take off at terrific speed. Outside the earthly atmosphere, interstellar gases are so rare that they would afford no traction for an airplane's propellor, no buoyance for wings. Most scientists with lunar leanings have therefore pondered shooting themselves moonwards in rockets. Herr Oberth, bearing...