The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 45
... journey as the length of the gun barrel is compared with the trajectory of the shell , so when we are considering interplanetary journeys we can forget about the initial period of acceleration and imagine that the spaceship starts with ...
... journey as the length of the gun barrel is compared with the trajectory of the shell , so when we are considering interplanetary journeys we can forget about the initial period of acceleration and imagine that the spaceship starts with ...
Pagina 71
... journey to the Moon . The human race is remarkably fortunate in having so near at hand a full - sized world with which to experiment : before we aim at the planets , we will have had a chance of perfecting our astronautical techniques ...
... journey to the Moon . The human race is remarkably fortunate in having so near at hand a full - sized world with which to experiment : before we aim at the planets , we will have had a chance of perfecting our astronautical techniques ...
Pagina 77
... journey down to the Moon and then lift it up again . It remains to be seen , however , whether this idea will prove to be practicable when allowance is made for all the complications it involves , and the restriction it puts on the ...
... journey down to the Moon and then lift it up again . It remains to be seen , however , whether this idea will prove to be practicable when allowance is made for all the complications it involves , and the restriction it puts on 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