The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 165
... Galaxy so that we see the stars packed in endless ranks as far as the eye , or even the telescope , can see . When we look in other directions , however , our gaze quickly passes out through the Galaxy's relatively thin disc and we can ...
... Galaxy so that we see the stars packed in endless ranks as far as the eye , or even the telescope , can see . When we look in other directions , however , our gaze quickly passes out through the Galaxy's relatively thin disc and we can ...
Pagina 170
... Galaxy is rotating , sweeping the stars round with it and completing one revolution in about 200,000,000 years . Since our planet was formed , therefore , the Sun has made only about a dozen circuits of the Milky Way . This slowly ...
... Galaxy is rotating , sweeping the stars round with it and completing one revolution in about 200,000,000 years . Since our planet was formed , therefore , the Sun has made only about a dozen circuits of the Milky Way . This slowly ...
Pagina 171
... Galaxy alone . Among all these , it can hardly be doubted that there would be many worlds on which life of some kind would be possible : there would even be a large number which would have physical conditions similar to those of Earth ...
... Galaxy alone . Among all these , it can hardly be doubted that there would be many worlds on which life of some kind would be possible : there would even be a large number which would have physical conditions similar to those of Earth ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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acceleration already astronautics astronomers atmosphere 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea 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 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