The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 15
... gravity . If gravity were weaker by a factor of four or five , the atmosphere would have escaped into space - as has happened in the case of the Moon . So we can be thankful for gravity in this respect , even though when we contemplate ...
... gravity . If gravity were weaker by a factor of four or five , the atmosphere would have escaped into space - as has happened in the case of the Moon . So we can be thankful for gravity in this respect , even though when we contemplate ...
Pagina 52
... gravity with distance from the Earth . One could , and usually would , feel weightless in a rocket a couple of hundred miles up , where the force of gravity is practically the same as here on the Earth's surface . The reason for this ...
... gravity with distance from the Earth . One could , and usually would , feel weightless in a rocket a couple of hundred miles up , where the force of gravity is practically the same as here on the Earth's surface . The reason for this ...
Pagina 97
... gravity . The only thing we can do is to look carefully at the functioning of the body , decide how gravity affects the various organs and physical processes , and then imagine what would happen if it were removed . The problem is ...
... gravity . The only thing we can do is to look carefully at the functioning of the body , decide how gravity affects the various organs and physical processes , and then imagine what would happen if it were removed . The problem is ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar 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 Propontis 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 trolley Uranus voyage weight