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 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight