The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 63
... energy has been released only in the forms of radiation and heat . It can be produced at all power levels from that ... energy of heat into energy of motion . The conventional rocket , of course , does exactly this . During combustion ...
... energy has been released only in the forms of radiation and heat . It can be produced at all power levels from that ... energy of heat into energy of motion . The conventional rocket , of course , does exactly this . During combustion ...
Pagina 175
... energy : anything like our present atomic power plants would be completely useless . Some means would be required of releasing a large percentage of the energy of matter ( not merely the o.1 per cent . we can liberate today ) and then ...
... energy : anything like our present atomic power plants would be completely useless . Some means would be required of releasing a large percentage of the energy of matter ( not merely the o.1 per cent . we can liberate today ) and then ...
Pagina 179
... energy , might enable speeds near that of light to be reached after relatively brief periods of acceleration . It ... energy : the only problem was to obtain this energy , and like all purely technical problems this was eventually solved ...
... energy , might enable speeds near that of light to be reached after relatively brief periods of acceleration . It ... energy : the only problem was to obtain this energy , and like all purely technical problems this was eventually solved ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium Mars and Venus Martian means Mercury meteors million minutes missile Moon Moon's motors never observed oxygen payload perhaps planetary planets Pluto possible pounds pressure pressurised probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refuelling return to Earth rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spinning stars stations surface take-off telescope temperature terrestrial thousand thrust tion trolley Uranus voyage weight