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 23
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
... imagine that , if one could make a workable pair of wings , they could be used to take one to the Moon . After Lucian , the theme of space - travel was neglected for almost fifteen hundred years . When it was again renewed , it was in a ...
Pagina 72
... imagine that the spaceship starts with the required velocity . The orbits shown in Figure 10 are , however , by no means the only paths that would take us from Earth to Mars and Venus : they are merely the most economical ones . Faster ...
... imagine that the spaceship starts with the required velocity . The orbits shown in Figure 10 are , however , by no means the only paths that would take us from Earth to Mars and Venus : they are merely the most economical ones . Faster ...
Pagina 169
... imagine . Yet it would be very unwise to rule it out as a long - term possibility . It is on the twenty - seven satellites of the giant planets that the explorers of the next century may find landing- places . Five of these worlds are ...
... imagine . Yet it would be very unwise to rule it out as a long - term possibility . It is on the twenty - seven satellites of the giant planets that the explorers of the next century may find landing- places . Five of these worlds are ...
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
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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