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 187
... greater heights , the orbital speed needed is less and so the period of revolution increases ; 22,000 miles above the surface the period is exactly twenty - four hours , and a body here , if originally above the Equator , would revolve ...
... greater heights , the orbital speed needed is less and so the period of revolution increases ; 22,000 miles above the surface the period is exactly twenty - four hours , and a body here , if originally above the Equator , would revolve ...
Pagina 200
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
Pagina 216
... greater and greater volume of space will become accessible to exploration . Before closing this chapter we must deal with two questions which any discussion of interstellar travel inevitably raises . In the first place , despite the ...
... greater and greater volume of space will become accessible to exploration . Before closing this chapter we must deal with two questions which any discussion of interstellar travel inevitably raises . In the first place , despite the ...
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