The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 27
... effect of this reduction , for a rocket rising vertically , is 20 mph for every second of climb or 1,200 mph for every minute . 70 These two factors may reduce a rocket's final velocity to about per cent of its theoretical value , but ...
... effect of this reduction , for a rocket rising vertically , is 20 mph for every second of climb or 1,200 mph for every minute . 70 These two factors may reduce a rocket's final velocity to about per cent of its theoretical value , but ...
Pagina 28
... effect , metal balloons . It should also be mentioned that as rockets grow larger , they become more efficient . To consider only one factor , a 100 - ton rocket needs little heavier guidance mechanism than a 10 - ton rocket - the ...
... effect , metal balloons . It should also be mentioned that as rockets grow larger , they become more efficient . To consider only one factor , a 100 - ton rocket needs little heavier guidance mechanism than a 10 - ton rocket - the ...
Pagina 171
... effects which concern us here involve the mass of an interstellar spaceship , and the " time - scale " of its occupants . The mass of a body increases with its speed . The effect is im- measurably small at ordinary velocities , and is ...
... effects which concern us here involve the mass of an interstellar spaceship , and the " time - scale " of its occupants . The mass of a body increases with its speed . The effect is im- measurably small at ordinary velocities , and is ...
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