The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 10
... Pluto ( 20 feet ) . And Pluto 3,700 miles from the Sun. . . . is This model of our Solar System shows very clearly the emptiness of space , and the difficulty of representing on the same scale both the sizes of the planets and the ...
... Pluto ( 20 feet ) . And Pluto 3,700 miles from the Sun. . . . is This model of our Solar System shows very clearly the emptiness of space , and the difficulty of representing on the same scale both the sizes of the planets and the ...
Pagina 11
... Pluto takes 248 years so that astronomers will have to wait until A.D. 2178 before it returns to the part of the sky where it was discovered in 1930. This increase in period from Mercury to Pluto is not merely due to the greater ...
... Pluto takes 248 years so that astronomers will have to wait until A.D. 2178 before it returns to the part of the sky where it was discovered in 1930. This increase in period from Mercury to Pluto is not merely due to the greater ...
Pagina 12
... Pluto depart seriously from this rule , their orbits being appreciably elliptical . That of Pluto , in fact , is so eccentric that it can sometimes come closer to the Sun than does Neptune . This , then , is the family of planets of ...
... Pluto depart seriously from this rule , their orbits being appreciably elliptical . That of Pluto , in fact , is so eccentric that it can sometimes come closer to the Sun than does Neptune . This , then , is the family of planets of ...
Cuprins
Automatic Rocket Surveying Mars | 3 |
The Earth and its Neighbours | 9 |
The Rocket | 17 |
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acceleration already astronautics astronomers atmosphere body bricks British Astronomical Association 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 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 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