The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 50
... atmosphere . It could then make a landing as a glider , slowly shedding its speed by air resistance . This operation ( called " entry by braking ellipses " ) is shown in Figure 11. It is of enormous importance , as it implies that no ...
... atmosphere . It could then make a landing as a glider , slowly shedding its speed by air resistance . This operation ( called " entry by braking ellipses " ) is shown in Figure 11. It is of enormous importance , as it implies that no ...
Pagina 128
... atmosphere . Carbon dioxide has been observed : it is about twice as abundant on Mars as on Earth . Water vapour has not been detected in the atmosphere , but infra - red bands due to ice have been observed in the polar caps . The air ...
... atmosphere . Carbon dioxide has been observed : it is about twice as abundant on Mars as on Earth . Water vapour has not been detected in the atmosphere , but infra - red bands due to ice have been observed in the polar caps . The air ...
Pagina 144
... atmospheres of these planets , but as we are looking at least fifty years ahead it is reasonable to suppose that by then nuclear power plants for aircraft will have been perfected , and the surrounding atmosphere will be used merely as ...
... atmospheres of these planets , but as we are looking at least fifty years ahead it is reasonable to suppose that by then nuclear power plants for aircraft will have been perfected , and the surrounding atmosphere will be used merely as ...
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