The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 123
... least ten and probably more like twenty times as long as ours . It will be seen , from the above facts , that there is no foundation at all for the rather common idea that Venus is a world of oceans and steaming swamps , like our own ...
... least ten and probably more like twenty times as long as ours . It will be seen , from the above facts , that there is no foundation at all for the rather common idea that Venus is a world of oceans and steaming swamps , like our own ...
Pagina 133
... least one goes nearer the Sun than Mercury . But the majority stay in the zone between Mars and Jupiter . The total number of asteroids , of all sizes , must run into at least five figures . Until recently , astronomers were unable to ...
... least one goes nearer the Sun than Mercury . But the majority stay in the zone between Mars and Jupiter . The total number of asteroids , of all sizes , must run into at least five figures . Until recently , astronomers were unable to ...
Pagina 143
... least as dense as Earth's , but probably not so compressed that it would be dangerous to human life . Thus while we may have to carry oxygen on Venus , we should require no additional mechanical aids - there will be no need for the ...
... least as dense as Earth's , but probably not so compressed that it would be dangerous to human life . Thus while we may have to carry oxygen on Venus , we should require no additional mechanical aids - there will be no need for 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