The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 72
... minutes , it would have built up speed from 18,000 m.p.h. to the 24,900 m.p.h. needed to get it to the Moon . During the closing stages the motors would probably be throttled back to give a lower acceleration , in order to make it ...
... minutes , it would have built up speed from 18,000 m.p.h. to the 24,900 m.p.h. needed to get it to the Moon . During the closing stages the motors would probably be throttled back to give a lower acceleration , in order to make it ...
Pagina 75
... minutes , during which time the ship would cover a distance of a hundred and sixty miles . It would certainly seem dangerous - not to mention hard on the nerves of the crew ! -to wait until the Moon was so close before doing any braking ...
... minutes , during which time the ship would cover a distance of a hundred and sixty miles . It would certainly seem dangerous - not to mention hard on the nerves of the crew ! -to wait until the Moon was so close before doing any braking ...
Pagina 143
... minutes . ( The record is actually 15 minutes ! ) An atmosphere of reasonable density would also simplify the construction of buildings , because it could be arranged that the tion of the gases were quite different . This would mean ...
... minutes . ( The record is actually 15 minutes ! ) An atmosphere of reasonable density would also simplify the construction of buildings , because it could be arranged that the tion of the gases were quite different . This would mean ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant Propontis propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust trolley Uranus voyage weight