The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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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 ...
Pagina 168
... stars , so closely packed towards the centre that the separate suns must be only light - hours apart , as against the light - years that normally lie between stars . There could be no such things as night and darkness on any worlds at ...
... stars , so closely packed towards the centre that the separate suns must be only light - hours apart , as against the light - years that normally lie between stars . There could be no such things as night and darkness on any worlds at ...
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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Termeni și expresii frecvente
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