The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 83
... period of powered flight . It might then become necessary to alter the ship's course in speed , direction , or both , to correct for this . We have already pointed out , on page 73 , that the actual orientation or attitude of a ...
... period of powered flight . It might then become necessary to alter the ship's course in speed , direction , or both , to correct for this . We have already pointed out , on page 73 , that the actual orientation or attitude of a ...
Pagina 149
... period of revolution increases ; 22,000 miles above the surface the period is exactly 24 hours , and a body here , if originally above the Equator , would revolve with the Earth so that it would neither rise nor set . An object at a ...
... period of revolution increases ; 22,000 miles above the surface the period is exactly 24 hours , and a body here , if originally above the Equator , would revolve with the Earth so that it would neither rise nor set . An object at a ...
Pagina 192
... period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth corresponds to a further column of stamps certainly hundreds of yards ...
... period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth corresponds to a further column of stamps certainly hundreds of yards ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
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