The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 45
... Venus at any time one pleased . The moment of departure would have to be calculated so that , when the spaceship reached the planet's orbit , the planet was there too ! In the case of the Venus jour- ney , which would last 145 days , Venus ...
... Venus at any time one pleased . The moment of departure would have to be calculated so that , when the spaceship reached the planet's orbit , the planet was there too ! In the case of the Venus jour- ney , which would last 145 days , Venus ...
Pagina 121
... Venus in this respect . It is quicker to reach Venus , but takes rather more power - at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalising one . As at her closest she is only ...
... Venus in this respect . It is quicker to reach Venus , but takes rather more power - at least if a landing is to be made . The case of Venus , sometimes called Earth's sister planet , is a tantalising one . As at her closest she is only ...
Pagina 122
... Venus is utterly featureless -or , to be more accurate , it is for ever hidden from us by clouds . These clouds make her the most brilliant object in the sky- so brilliant that she can be seen with ease in daytime if one knows exactly ...
... Venus is utterly featureless -or , to be more accurate , it is for ever hidden from us by clouds . These clouds make her the most brilliant object in the sky- so brilliant that she can be seen with ease in daytime if one knows exactly ...
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