The Exploration of Space |
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Pagina 116
The object in the middle distance looking like an oversized electric fire is a solar power plant , collecting the Sun's rays and focusing them on to boiler pipes which carry their heated contents to a turbine .
The object in the middle distance looking like an oversized electric fire is a solar power plant , collecting the Sun's rays and focusing them on to boiler pipes which carry their heated contents to a turbine .
Pagina 161
Our views on the existence of planets in the Universe are likely , for the time being , to be determined by whether we think the Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion ...
Our views on the existence of planets in the Universe are likely , for the time being , to be determined by whether we think the Solar System to be something usual , or an astronomical freak . Until quite recently , the latter opinion ...
Pagina 176
It is therefore obvious that , even if a great many advanced civilizations were scattered around the Galaxy , we could not expect our own Solar System to be visited except at very rare intervals . The situation would not be greatly ...
It is therefore obvious that , even if a great many advanced civilizations were scattered around the Galaxy , we could not expect our own Solar System to be visited except at very rare intervals . The situation would not be greatly ...
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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