The Exploration of Space |
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Pagina 69
An internal source of warmth would be needed during prolonged periods of darkness , and this could best be obtained by the combustion of fuel in a small heater . In general , it can be said that temperature control does not present very ...
An internal source of warmth would be needed during prolonged periods of darkness , and this could best be obtained by the combustion of fuel in a small heater . In general , it can be said that temperature control does not present very ...
Pagina 83
would become apparent that the ship's actual position was beginning to deviate from the orbit it should be following , owing to the inevitable errors in the initial period of powered flight . It might then become necessary to alter the ...
would become apparent that the ship's actual position was beginning to deviate from the orbit it should be following , owing to the inevitable errors in the initial period of powered flight . It might then become necessary to alter the ...
Pagina 192
The column then represents the age of the world , the coin the whole period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth ...
The column then represents the age of the world , the coin the whole period of Man's existence , and the stamp the length of time during which he has been slightly civilised . The period during which life will be possible on Earth ...
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Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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Termeni și expresii frecvente
able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors moving necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole