The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 1
... universe : astronomers had calculated the distances of the planets before , but now at last Man had an instrument with which he could actually see into the depths of space . From this moment , the old medieval con- ception of the universe ...
... universe : astronomers had calculated the distances of the planets before , but now at last Man had an instrument with which he could actually see into the depths of space . From this moment , the old medieval con- ception of the universe ...
Pagina 170
... universes , and it is about 700,000 light - years away . In whatever direction we look ( except those in which clouds ... universe " is merely the Milky Way system . Astronomers usually employ the word " cosmos " to describe the whole of ...
... universes , and it is about 700,000 light - years away . In whatever direction we look ( except those in which clouds ... universe " is merely the Milky Way system . Astronomers usually employ the word " cosmos " to describe the whole of ...
Pagina 172
... Universe - for that matter , possibly elsewhere in our own Solar System - it may have appeared much earlier . When one considers the history of mankind , and compares it with the ages of the stars , it is difficult to avoid the ...
... Universe - for that matter , possibly elsewhere in our own Solar System - it may have appeared much earlier . When one considers the history of mankind , and compares it with the ages of the stars , it is difficult to avoid the ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar 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 Propontis 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 trolley Uranus voyage weight