The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 64
... problem is getting the heat out of the pile quickly enough to prevent it melting - and then to transfer this heat to the propellant . That is the purely engineering problem , and it is an exceedingly difficult one . But there is also ...
... problem is getting the heat out of the pile quickly enough to prevent it melting - and then to transfer this heat to the propellant . That is the purely engineering problem , and it is an exceedingly difficult one . But there is also ...
Pagina 112
... problem of weight , though it must be remembered that the inertia would be unaltered . ( On the Moon it would be six times easier to lift a sledge - hammer than on the Earth -- but it would be just as hard to swing it . ) If even this ...
... problem of weight , though it must be remembered that the inertia would be unaltered . ( On the Moon it would be six times easier to lift a sledge - hammer than on the Earth -- but it would be just as hard to swing it . ) If even this ...
Pagina 188
... problem to those wishing to take an active part in the develop- ment of astronautics , for almost all research on rockets is now carried out by military establishments and is covered by various security classifications . The technical ...
... problem to those wishing to take an active part in the develop- ment of astronautics , for almost all research on rockets is now carried out by military establishments and is covered by various security classifications . The technical ...
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