The Exploration of SpacePocket Books, 1979 - 237 pagini Presents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 75
... 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 106
... 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 refueled either by a tanker from Earth which had been waiting for ...
... 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 refueled either by a tanker from Earth which had been waiting for ...
Pagina 121
... reach- ing a uniform level about fifteen times that at the Earth's surface . Although the effects of cosmic rays over prolonged periods of time , such as the weeks of flight on an inter- planetary journey , are still unknown , it does ...
... reach- ing a uniform level about fifteen times that at the Earth's surface . Although the effects of cosmic rays over prolonged periods of time , such as the weeks of flight on an inter- planetary journey , are still unknown , it does ...
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
Drept de autor | |
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acceleration airless already astronautics astronomers atmo atmosphere body bricks build carry certainly Chapter chemical completely conquest of space consider course crew degrees F difficult direction distance Earth energy enormous escape velocity exist exploration extremely fact Figure fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere Jerry Pournelle journey Jupiter landing large number light light-years lunar Mars and Venus Martian means Mercury meteors miles in diameter million minutes missile Moon Moon's motors never normal observed once oxygen payload perhaps planetary planets Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri radar radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spin stars stations surface take-off telescope temperature thousand thrust tion trolley voyage weight weightless