The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 21
... matter in the least what happens to the bricks after they have left the hand of the thrower : all the recoil or thrust is produced during the act of throwing itself . The method of propulsion is , therefore , indepen- dent of any ...
... matter in the least what happens to the bricks after they have left the hand of the thrower : all the recoil or thrust is produced during the act of throwing itself . The method of propulsion is , therefore , indepen- dent of any ...
Pagina 53
... matter of weightlessness is perhaps the cause of more confusion than anything else in astronautics . One can , however , avoid all difficulty by remembering the simple rule that , outside an atmosphere , a spaceship and its contents are ...
... matter of weightlessness is perhaps the cause of more confusion than anything else in astronautics . One can , however , avoid all difficulty by remembering the simple rule that , outside an atmosphere , a spaceship and its contents are ...
Pagina 64
... matter , as the rapidly moving gases could contaminate a very large area . This fact may well make it unsafe for nuclear - powered rockets to take off from the Earth's surface , but would not rule out their use in space . Once again ...
... matter , as the rapidly moving gases could contaminate a very large area . This fact may well make it unsafe for nuclear - powered rockets to take off from the Earth's surface , but would not rule out their use in space . Once again ...
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