The Exploration of SpaceHarper, 1959 - 200 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 27
Pagina 63
... produce small thrusts for long periods of time than very great thrusts for short periods . We have to use the latter to get our spaceships away from the Earth , and thus we may be forced to employ chemical rockets at this stage . But ...
... produce small thrusts for long periods of time than very great thrusts for short periods . We have to use the latter to get our spaceships away from the Earth , and thus we may be forced to employ chemical rockets at this stage . But ...
Pagina 74
... produce changes of spin and orientation , though very small ones . If it proved necessary , these could be taken care of by automatic , gyro - controlled equipment . To return to our ship falling towards the Moon . We will assume that ...
... produce changes of spin and orientation , though very small ones . If it proved necessary , these could be taken care of by automatic , gyro - controlled equipment . To return to our ship falling towards the Moon . We will assume that ...
Pagina 150
... produce temperatures not far from absolute zero over large volumes of space . The study of cosmic rays ( one of the key problems of modern physics ) would receive an immense impetus , since only outside the atmosphere can we observe the ...
... produce temperatures not far from absolute zero over large volumes of space . The study of cosmic rays ( one of the key problems of modern physics ) would receive an immense impetus , since only outside the atmosphere can we observe the ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
Drept de autor | |
1 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
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