The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 51
... fall back to earth along a line extending eastwards from the launching site , the actual points of impact depending on the height of release and the velocities at separation . In extreme cases , the last step but one might go almost ...
... fall back to earth along a line extending eastwards from the launching site , the actual points of impact depending on the height of release and the velocities at separation . In extreme cases , the last step but one might go almost ...
Pagina 52
... fall , but this is perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps ...
... fall , but this is perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps ...
Pagina 73
... fall unhindered , it would crash into the Moon at about 5,200 m.p.h. The problem of landing on the Moon is one which , despite its obvious importance , has not received as much attention as it should . Clearly it can only be done by ...
... fall unhindered , it would crash into the Moon at about 5,200 m.p.h. The problem of landing on the Moon is one which , despite its obvious importance , has not received as much attention as it should . Clearly it can only be done by ...
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