The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 48
... reach speeds of perhaps 15,000 m.p.h. and heights of 2,000 miles , but they would be unable to reach circular velocity and so would have to return to Earth . To get into an orbit we should need something like the two- step rocket ...
... reach speeds of perhaps 15,000 m.p.h. and heights of 2,000 miles , but they would be unable to reach circular velocity and so would have to return to Earth . To get into an orbit we should need something like the two- step rocket ...
Pagina 77
... reach orbital velocity . In the case of the Moon , this is 3,700 m.p.h. ( thus a V.2 rocket could quite easily become a lunar sub - satellite ! ) . The ship might then be refuelled either by a tanker from Earth which had been waiting ...
... reach orbital velocity . In the case of the Moon , this is 3,700 m.p.h. ( thus a V.2 rocket could quite easily become a lunar sub - satellite ! ) . The ship might then be refuelled either by a tanker from Earth which had been waiting ...
Pagina 193
... reach that outer reality , but one day we may hope to reach other prisoners in adjoining caves , where we may learn far more than we could ever do by our own unaided efforts . Yet space - travel will not , as some fear , destroy the ...
... reach that outer reality , but one day we may hope to reach other prisoners in adjoining caves , where we may learn far more than we could ever do by our own unaided efforts . Yet space - travel will not , as some fear , destroy the ...
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