The Exploration of Space |
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Pagina 29
To go beyond this figure , we must develop more powerful fuels , or employ vehicles with more than one stage ge of ... to look a little more closely at the operation of the motor to see exactly where and how the thrust is developed .
To go beyond this figure , we must develop more powerful fuels , or employ vehicles with more than one stage ge of ... to look a little more closely at the operation of the motor to see exactly where and how the thrust is developed .
Pagina 121
Venus may be a planet in such an early state of evolution that life has not had a chance to develop although this seems ... can never look out into space , they must have developed the other sciences before they came to astronomy .
Venus may be a planet in such an early state of evolution that life has not had a chance to develop although this seems ... can never look out into space , they must have developed the other sciences before they came to astronomy .
Pagina 145
Conditions on the other planets will probably stimulate the development of robots which can replace man in hazardous ... When one considers some of the heavy machines which we have developed during the last generation to change the face ...
Conditions on the other planets will probably stimulate the development of robots which can replace man in hazardous ... When one considers some of the heavy machines which we have developed during the last generation to change the face ...
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Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbors | 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 discuss distance Earth effect energy exist exploration extremely fact fall field Figure fuel give gravity greater heat hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles million minutes Moon necessary never observed once operation orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason remain rocket round satellite seems seen ship shown simple Solar space spaceship speed stars stations structure suggested surface telescope temperature thousand Universe vehicle velocity Venus weight whole