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 35
... moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the Solar System is ...
... moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the Solar System is ...
Pagina 79
... moving freely in empty space , with its motors cut off , is not resisting gravity : on the con- trary , it is letting gravity take it where it will . It is some- times said to be in free fall , but this is perhaps an unfortunate phrase ...
... moving freely in empty space , with its motors cut off , is not resisting gravity : on the con- trary , it is letting gravity take it where it will . It is some- times said to be in free fall , but this is perhaps an unfortunate phrase ...
Pagina 131
... moving past the portholes . Even then the impression would be a purely psychological one - of the kind most people have experienced when sitting in a train and seeing another apparently moving on a parallel track . In those ...
... moving past the portholes . Even then the impression would be a purely psychological one - of the kind most people have experienced when sitting in a train and seeing another apparently moving on a parallel track . In those ...
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