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 59
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it may con- tinue to orbit the Earth indefinitely in a circular ...
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it may con- tinue to orbit the Earth indefinitely in a circular ...
Pagina 73
... escape from the Earth , and when it has done this must still have enough velocity left to put it into the required " voyage orbit . " This means that it must start with a speed greater than that needed merely to escape - though in most ...
... escape from the Earth , and when it has done this must still have enough velocity left to put it into the required " voyage orbit . " This means that it must start with a speed greater than that needed merely to escape - though in most ...
Pagina 235
... escape from , 56-7 Heaviside Layer , see Iono- sphere Interstellar travel , 210-18 Ionosphere , 37 effect on radio , 116 Jupiter , 169-70 Escape , velocity of , 58 Kepler , Johannes , 24 Life in universe , 207-08 , 228-29 on Mars , 235 ...
... escape from , 56-7 Heaviside Layer , see Iono- sphere Interstellar travel , 210-18 Ionosphere , 37 effect on radio , 116 Jupiter , 169-70 Escape , velocity of , 58 Kepler , Johannes , 24 Life in universe , 207-08 , 228-29 on Mars , 235 ...
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