The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 163
... star , although it is a good deal brighter than the average . ( Only three of the twenty nearest stars exceed it in brilliance , and the vast majority are far fainter . ) It is one of a very large number - perhaps 100,000,000,000— of stars ...
... star , although it is a good deal brighter than the average . ( Only three of the twenty nearest stars exceed it in brilliance , and the vast majority are far fainter . ) It is one of a very large number - perhaps 100,000,000,000— of stars ...
Pagina 164
... stars is even greater . Stars 10,000 times as bright as the Sun are known as well as stars 10,000 times fainter . With these variations of brilliance go variations of colour . Our Sun , whose light we regard as normal , is actually a ...
... stars is even greater . Stars 10,000 times as bright as the Sun are known as well as stars 10,000 times fainter . With these variations of brilliance go variations of colour . Our Sun , whose light we regard as normal , is actually a ...
Pagina 165
... stars around the sky . The heart of our own Galaxy , where the stars are clustered together more thickly than they are in the neighbourhood of the Sun , lies towards the constellation Sagittarius . Plate XIV ( b ) gives some idea of the ...
... stars around the sky . The heart of our own Galaxy , where the stars are clustered together more thickly than they are in the neighbourhood of the Sun , lies towards the constellation Sagittarius . Plate XIV ( b ) gives some idea of the ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets body bricks British Astronomical Association build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant 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