The Exploration of SpaceTemple Press, 1951 - 198 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 journey , 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 journey , which would last 145 days , Venus ...
Pagina 81
... Venus and the Sun - and since the line Sun - Venus is also known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation ...
... Venus and the Sun - and since the line Sun - Venus is also known , simple geometry fixes the spaceship's position at X. Since there would seldom be less than three , and would often be five , bright planets available for observation ...
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 ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
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acceleration already astronautics astronomers atmosphere atomic rockets 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 gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mars and Venus Martian means Mercury meteors 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