The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 40
... already obtained radio echoes from the Moon - a feat hundreds of times more difficult than sending a one - way signal over the same distance ! ) During the next decade it would certainly be possible to build an orbiting rocket carrying ...
... already obtained radio echoes from the Moon - a feat hundreds of times more difficult than sending a one - way signal over the same distance ! ) During the next decade it would certainly be possible to build an orbiting rocket carrying ...
Pagina 142
... already have enough to deal with . Yet if our survey of the subject is to have claim to thoroughness , we cannot overlook these difficulties . The speed with which the planets are explored and all their possibilities developed depends ...
... already have enough to deal with . Yet if our survey of the subject is to have claim to thoroughness , we cannot overlook these difficulties . The speed with which the planets are explored and all their possibilities developed depends ...
Pagina 150
... already obvious . The most important may be listed as follows : ( 1 ) astronomical and physical research ; ( 2 ) meteorology and surveying ; ( 3 ) biological studies ; ( 4 ) refuel- ling ; ( 5 ) radio relaying ; and ( 6 ) dock ...
... already obvious . The most important may be listed as follows : ( 1 ) astronomical and physical research ; ( 2 ) meteorology and surveying ; ( 3 ) biological studies ; ( 4 ) refuel- ling ; ( 5 ) radio relaying ; and ( 6 ) dock ...
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