The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 41
... close - ups of our satellite's visible face , but could also give us our first view of the hidden regions on its far side . Nor need the Moon be our only target , by any means . As will be shown in the next chapter , once one has ...
... close - ups of our satellite's visible face , but could also give us our first view of the hidden regions on its far side . Nor need the Moon be our only target , by any means . As will be shown in the next chapter , once one has ...
Pagina 124
... close at hand . That it was relatively close they would have realised after a few days ' observations , for it would be shifting rapidly against the fixed background of the Milky Way . After several months they would know that the ...
... close at hand . That it was relatively close they would have realised after a few days ' observations , for it would be shifting rapidly against the fixed background of the Milky Way . After several months they would know that the ...
Pagina 167
... close together that their gravitational fields distort them into ellipses , the longer axes pointing towards each other . Linking the two stars is a bridge of incandescent hydrogen , which sprays out from the central sun towards its ...
... close together that their gravitational fields distort them into ellipses , the longer axes pointing towards each other . Linking the two stars is a bridge of incandescent hydrogen , which sprays out from the central sun towards its ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks 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 ionosphere journey Jupiter landing light light-years lunar Mare Imbrium 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 tion trolley Uranus voyage weight