The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 15
... surface on the way into space and much more important — it offers a means of making a safe landing on the return . This thin blanket of air , without which life as we know it would be impossible , is held tightly to the Earth by the ...
... surface on the way into space and much more important — it offers a means of making a safe landing on the return . This thin blanket of air , without which life as we know it would be impossible , is held tightly to the Earth by the ...
Pagina 31
... surface , therefore , as we look up at the planets and wonder how we can reach them , are in rather the same position as people at the bottom of a perfectly smooth pit or funnel 4,000 miles deep , set in the surface of an endless , flat ...
... surface , therefore , as we look up at the planets and wonder how we can reach them , are in rather the same position as people at the bottom of a perfectly smooth pit or funnel 4,000 miles deep , set in the surface of an endless , flat ...
Pagina 149
... surface the period is exactly 24 hours , and a body here , if originally above the Equator , would revolve with the ... surface of the Earth could be surveyed . The same result would be obtained by using an orbit inclined to the Equator ...
... surface the period is exactly 24 hours , and a body here , if originally above the Equator , would revolve with the ... surface of the Earth could be surveyed . The same result would be obtained by using an orbit inclined to the Equator ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust tion trolley Uranus voyage weight