The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 10
... exist : the resistance to their motion would have made them spiral inwards until they dropped into the Sun. There will be opportunity later to look more closely at the other planets , and to see what is known about their physical ...
... exist : the resistance to their motion would have made them spiral inwards until they dropped into the Sun. There will be opportunity later to look more closely at the other planets , and to see what is known about their physical ...
Pagina 128
... exist , can obtain the oxygen they need from the soil rather than from the atmosphere . It should be remembered that the other basic raw materials for plant life are carbon dioxide , water and sunlight 128 THE EXPLORATION OF SPACE.
... exist , can obtain the oxygen they need from the soil rather than from the atmosphere . It should be remembered that the other basic raw materials for plant life are carbon dioxide , water and sunlight 128 THE EXPLORATION OF SPACE.
Pagina 141
... exist even on the frozen outer worlds . One can imagine beings with tough , insulating skins through which the heat loss would be very small . As long as they had some source of energy - chemical , solar , perhaps even nuclear - and the ...
... exist even on the frozen outer worlds . One can imagine beings with tough , insulating skins through which the heat loss would be very small . As long as they had some source of energy - chemical , solar , perhaps even nuclear - and the ...
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