The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 22
... once that doubling the speed of ejection of the bricks would double the speed of the trolley . But suppose that it was impossible to increase this any further , as would be the case if the brick - thrower were working at the limit of ...
... once that doubling the speed of ejection of the bricks would double the speed of the trolley . But suppose that it was impossible to increase this any further , as would be the case if the brick - thrower were working at the limit of ...
Pagina 41
... once one has escaped from the Earth the journeys to the planets , though the distances involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an ...
... once one has escaped from the Earth the journeys to the planets , though the distances involved may be hundreds of millions of miles , require very little extra energy . A striking example of this is given by the fact that though an ...
Pagina 65
... once in space , where the gentlest of drives will eventually produce any required velocity , atomic propulsion may come into its own . The picture we now have of the various vehicles needed for interplanetary travel is a good deal more ...
... once in space , where the gentlest of drives will eventually produce any required velocity , atomic propulsion may come into its own . The picture we now have of the various vehicles needed for interplanetary travel is a good deal more ...
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