The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 67
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ...
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ...
Pagina 81
... known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely ...
... known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation this is clearly a very useful method , as well as an extremely ...
Pagina 175
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for propulsion , particularly under the ...
... known laboratory experiment to demonstrate this . With ordinary currents and powers the thrust is negligible , but there is no fundamental reason why such a device should not be developed for propulsion , particularly under the ...
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