The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet always maintaining their distance . The speed necessary to move in such an orbit near the bottom of ...
... orbit as it circles the Earth . And in just the same way the planets revolve round the Sun , prisoners of its gravitational field yet always maintaining their distance . The speed necessary to move in such an orbit near the bottom of ...
Pagina 61
... orbit , so that they can break away from the Earth , make a reconnaissance of the Moon , and return to the Earth orbit . ( 5 ) The type of ship designed for a lunar landing will be flown up from Earth or assembled in free orbit , and ...
... orbit , so that they can break away from the Earth , make a reconnaissance of the Moon , and return to the Earth orbit . ( 5 ) The type of ship designed for a lunar landing will be flown up from Earth or assembled in free orbit , and ...
Pagina 77
... orbit similar to that which it traversed on the outward voyage , and taking the same time - five days . This would be the simplest procedure , if the ship carried sufficient fuel . On the other hand , it is more than likely that the ...
... orbit similar to that which it traversed on the outward voyage , and taking the same time - five days . This would be the simplest procedure , if the ship carried sufficient fuel . On the other hand , it is more than likely that the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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Termeni și expresii frecvente
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