The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 32
... seen pictures of the " Wall of Death " , a popular circus side - show in which a motor - cyclist drives round the inside of an almost vertical cylinder , centrifugal force allow- ing him to defy gravity . It will be seen that exactly ...
... seen pictures of the " Wall of Death " , a popular circus side - show in which a motor - cyclist drives round the inside of an almost vertical cylinder , centrifugal force allow- ing him to defy gravity . It will be seen that exactly ...
Pagina 94
... seen on page 67 , the oxygen consumption is also two pounds per day for man . The water requirements are not so easy to calculate , since the amount of liquid the body needs varies a great deal with circumstances . Moreover , unlike ...
... seen on page 67 , the oxygen consumption is also two pounds per day for man . The water requirements are not so easy to calculate , since the amount of liquid the body needs varies a great deal with circumstances . Moreover , unlike ...
Pagina 122
... seen with ease in daytime if one knows exactly where to look - but they must cut Venus off from the glory of the stars and even the full light of the Sun. It is possible that direct sunlight may never reach the surface of the planet ...
... seen with ease in daytime if one knows exactly where to look - but they must cut Venus off from the glory of the stars and even the full light of the Sun. It is possible that direct sunlight may never reach the surface of the planet ...
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