The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 46
... round the Sun , taking four years in the process , before it came near Earth again ! Missing an appointment may or may not be a serious matter in everyday life , but in interplanetary travel it would , almost inevitably , be fatal . We ...
... round the Sun , taking four years in the process , before it came near Earth again ! Missing an appointment may or may not be a serious matter in everyday life , but in interplanetary travel it would , almost inevitably , be fatal . We ...
Pagina 61
... round the Earth , and will travel to the Moon and planets . ( 2 ) Manned , single - step rockets will ascend to heights of several hundred miles , landing by wings or parachutes . ( 3 ) Multistage , manned rockets will enter circular ...
... round the Earth , and will travel to the Moon and planets . ( 2 ) Manned , single - step rockets will ascend to heights of several hundred miles , landing by wings or parachutes . ( 3 ) Multistage , manned rockets will enter circular ...
Pagina 131
... round Mars more quickly than Mars revolves on its axis , it rises in the west and sets in the east . Much of the time it must be eclipsed by the shadow of the planet , and as it would be about a quarter the apparent size of our Moon it ...
... round Mars more quickly than Mars revolves on its axis , it rises in the west and sets in the east . Much of the time it must be eclipsed by the shadow of the planet , and as it would be about a quarter the apparent size of our Moon it ...
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