The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 22
... increased in this manner , but it is an inefficient way of doing so . It would be far more economical to increase the speed of ejection than to increase the load of bricks , and the latter should only be done if there is no alternative ...
... increased in this manner , but it is an inefficient way of doing so . It would be far more economical to increase the speed of ejection than to increase the load of bricks , and the latter should only be done if there is no alternative ...
Pagina 90
... increases , reaching a maximum about twelve miles up , where it may be fifty times as intense as at sea level . With further increase of altitude the value drops again , reaching a uniform level about fifteen times that at the Earth's ...
... increases , reaching a maximum about twelve miles up , where it may be fifty times as intense as at sea level . With further increase of altitude the value drops again , reaching a uniform level about fifteen times that at the Earth's ...
Pagina 96
... increased and a man can survive even twenty gravities for periods of up to a minute . The human body is built ... increase in structural weight to withstand them . Four gravities in the “ lying prone " position would not even be ...
... increased and a man can survive even twenty gravities for periods of up to a minute . The human body is built ... increase in structural weight to withstand them . Four gravities in the “ lying prone " position would not even be ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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Termeni și expresii frecvente
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