The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 20
... example , unlike the case of walking , fraction did not play any part in producing the thrust . The man was able to exert the necessary " push " against some fixed part of the trolley . A more familiar , and certainly more striking , ...
... example , unlike the case of walking , fraction did not play any part in producing the thrust . The man was able to exert the necessary " push " against some fixed part of the trolley . A more familiar , and certainly more striking , ...
Pagina 38
... example , Gatland , Kunesch and Dixon of the British Interplanetary Society have shown how , by the use of existing V.2 motors , a payload of 110 pounds could be sent into an orbit round the Earth . The rocket would be a three - step ...
... example , Gatland , Kunesch and Dixon of the British Interplanetary Society have shown how , by the use of existing V.2 motors , a payload of 110 pounds could be sent into an orbit round the Earth . The rocket would be a three - step ...
Pagina 140
... example , on parts of Mercury . Faced with an unpromising environment , life has the choice of two alternatives - adaptation , or insulation . Examples of both can be seen on our world . In the polar regions , the seals and penguins ...
... example , on parts of Mercury . Faced with an unpromising environment , life has the choice of two alternatives - adaptation , or insulation . Examples of both can be seen on our world . In the polar regions , the seals and penguins ...
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