The Exploration of SpacePresents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 49
acceleration will steadily increase as propellant is used up and the rocket becomes lighter . ( 3 ) The final speed depends directly on the ejection ( or exhaust ) speed : doubling the latter will double the former , and so on ...
acceleration will steadily increase as propellant is used up and the rocket becomes lighter . ( 3 ) The final speed depends directly on the ejection ( or exhaust ) speed : doubling the latter will double the former , and so on ...
Pagina 52
apply to a rocket operating in space , but it plays an appreciable part in the case of a rocket climbing through the atmosphere , cutting down its speed by five or ten percent ( and very much more in the case of small rockets ) .
apply to a rocket operating in space , but it plays an appreciable part in the case of a rocket climbing through the atmosphere , cutting down its speed by five or ten percent ( and very much more in the case of small rockets ) .
Pagina 62
In this case , one of the alternatives is the multi - stage or " step ” rocket . It will be obvious that if we build a rocket capable of carrying a certain payload , and make that payload another rocket carrying the same percentage of ...
In this case , one of the alternatives is the multi - stage or " step ” rocket . It will be obvious that if we build a rocket capable of carrying a certain payload , and make that payload another rocket carrying the same percentage of ...
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Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
Drept de autor | |
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able acceleration achieved actual already appear astronautics atmosphere become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discuss distance Earth effect energy equal escape exist exploration extremely fact fall field Figure fuel give gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing later least less light limit live look lunar Mars material matter means miles million minutes Moon moving necessary never normal observed once orbit oxygen perhaps period planets possible practical present pressure probably problem produce purely radio range reach reason remain rocket round satellite scientific seems seen ship simple Solar space spaceship speed stars surface telescope temperature thousand tion velocity Venus weight
Referințe la această carte
The MIR Space Station: A Precursor to Space Colonization David M. Harland Vizualizare fragmente - 1997 |
Space Travel: A History Wernher Von Braun,Frederick Ira Ordway (III),Fred Durant,David Dooling Vizualizare fragmente - 1985 |