The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 43
... journey from orbit to orbit , which may cover a distance ten thousand times as great . Once again it should be emphasized that , to travel from one planet to another , rocket power need only be used for a few minutes at the beginning ...
... journey from orbit to orbit , which may cover a distance ten thousand times as great . Once again it should be emphasized that , to travel from one planet to another , rocket power need only be used for a few minutes at the beginning ...
Pagina 45
... journey . It can be said at once that there is no possibility of fulfilling these requirements , for even the easiest of interplanetary return journeys , by the use of chemically fueled step - rockets alone . The starting weights would ...
... journey . It can be said at once that there is no possibility of fulfilling these requirements , for even the easiest of interplanetary return journeys , by the use of chemically fueled step - rockets alone . The starting weights would ...
Pagina 76
... journey down to the Moon and then lift it up again . It remains to be seen , however , whether this idea will prove practicable when allowance is made for all the complications it involves , and the restriction it puts on the return ...
... journey down to the Moon and then lift it up again . It remains to be seen , however , whether this idea will prove practicable when allowance is made for all the complications it involves , and the restriction it puts on the return ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless