The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 33
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it continue to orbit the Earth indefinitely in a circular or ...
... escape from it completely if its speed is over 25,000 m.p.h. If its speed is less than this , it may either fall back again or , if it is aimed in the correct direction , it continue to orbit the Earth indefinitely in a circular or ...
Pagina 34
... escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him over a hill . To surmount our imaginary ...
... escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him over a hill . To surmount our imaginary ...
Pagina 196
... Escape , velocity of , 32 Food provision on Moon , 118-9 requirements in spaceflight , 93-4 Galaxy size , 170 structure , 164 Galileo , G. , 2 Gas , interstellar , 92-3 Goddard , R. H. , 17-18 Godwin , Bishop Man in the Moone , 3-4 ...
... Escape , velocity of , 32 Food provision on Moon , 118-9 requirements in spaceflight , 93-4 Galaxy size , 170 structure , 164 Galileo , G. , 2 Gas , interstellar , 92-3 Goddard , R. H. , 17-18 Godwin , Bishop Man in the Moone , 3-4 ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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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 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 scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole