The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 120
... relatively small solid bodies like the Earth , Mercury , Mars , Venus and Pluto . These range in size from eight thousand miles in diameter downwards , and all have a density several times that of water . They can properly be called ...
... relatively small solid bodies like the Earth , Mercury , Mars , Venus and Pluto . These range in size from eight thousand miles in diameter downwards , and all have a density several times that of water . They can properly be called ...
Pagina 149
... relatively short periods , will follow soon after . It is better , however , to restrict the term to permanent manned bases or observatories , constructed in space by materials ferried up by rocket and kept supplied with stores and ...
... relatively short periods , will follow soon after . It is better , however , to restrict the term to permanent manned bases or observatories , constructed in space by materials ferried up by rocket and kept supplied with stores and ...
Pagina 155
... relatively short periods of eclipse by the Earth , a space - station would be in continuous sunlight would be of great therapeutic value . So would be the spectacle of the Earth itself , almost filling the sky and going through its ...
... relatively short periods of eclipse by the Earth , a space - station would be in continuous sunlight would be of great therapeutic value . So would be the spectacle of the Earth itself , almost filling the sky and going through its ...
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