The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 19
... consider how the rocket works and just why it is that it has become of such supreme importance in astronautics . It is often stated that rocket propulsion depends on reaction— to put it colloquially , upon " pushing " . This is ...
... consider how the rocket works and just why it is that it has become of such supreme importance in astronautics . It is often stated that rocket propulsion depends on reaction— to put it colloquially , upon " pushing " . This is ...
Pagina 32
... considering the journey from Earth to Moon . ) This " gravitational pit " is shown in cross - section in Figure 9 ... consider what would happen if a body - say a marble — were propelled up its slope at a certain initial speed . Quite ...
... considering the journey from Earth to Moon . ) This " gravitational pit " is shown in cross - section in Figure 9 ... consider what would happen if a body - say a marble — were propelled up its slope at a certain initial speed . Quite ...
Pagina 139
... consider a good vacuum they are not of much interest to astronautics . Some of the larger specimens may have a solid core but this probably consists of nothing more than a cluster of meteors . Planets - satellites - asteroids - comets ...
... consider a good vacuum they are not of much interest to astronautics . Some of the larger specimens may have a solid core but this probably consists of nothing more than a cluster of meteors . Planets - satellites - asteroids - comets ...
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 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