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
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole