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 155
... Mars and Venus in this respect . It is quicker to reach Venus , but takes rather more power at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalizing one . As at her closest she ...
... Mars and Venus in this respect . It is quicker to reach Venus , but takes rather more power at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalizing one . As at her closest she ...
Pagina 165
... Mars . The probability that it has plant life of some kind is very high ... Venus are the only two planets on which there was the slightest hope of ... Mars and Venus have been reached , the next planet to be attained will be Mercury ...
... Mars . The probability that it has plant life of some kind is very high ... Venus are the only two planets on which there was the slightest hope of ... Mars and Venus have been reached , the next planet to be attained will be Mercury ...
Pagina 180
... Mars this would not involve any danger . Since the astronomical evidence suggests that oxygen may be present in very large quantities on Mars and Venus , though in each case combined with other ele- ments , the provision of a breathable ...
... Mars this would not involve any danger . Since the astronomical evidence suggests that oxygen may be present in very large quantities on Mars and Venus , though in each case combined with other ele- ments , the provision of a breathable ...
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