The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... necessary to move in such an orbit near the bottom of the crater ( i.e. near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called " circular velocity " . Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
... necessary to move in such an orbit near the bottom of the crater ( i.e. near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called " circular velocity " . Other similar orbits are shown at ( f ) and ( g ) . These are by no ...
Pagina 60
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an observer would be blinded , but would also ...
... necessary for visual and radar observation of the approach to the Moon . This apparatus has to be kept clear of the rocket jet , which would not only produce such an intense glare that an observer would be blinded , but would also ...
Pagina 78
... necessary to carry fuel for the return journey . Even if we avoid the need to build a single impossibly large ship by arranging a rendezvous with a tanker off the Moon , it would still be necessary to carry many separate loads all the ...
... necessary to carry fuel for the return journey . Even if we avoid the need to build a single impossibly large ship by arranging a rendezvous with a tanker off the Moon , it would still be necessary to carry many separate loads all the ...
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