The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 67
... suggested that we might employ Nature's method of purifying the atmosphere - in other words suitable green plants should be carried in the spaceship ! As is well known , plants absorb carbon dioxide ( in the presence of sunlight ) and ...
... suggested that we might employ Nature's method of purifying the atmosphere - in other words suitable green plants should be carried in the spaceship ! As is well known , plants absorb carbon dioxide ( in the presence of sunlight ) and ...
Pagina 126
... suggests that they are composed of ice , and this explanation is now universally accepted . The Martian ice caps , however , must be far thinner than the ... suggested that the planet's characteristic redness is 126 THE EXPLORATION OF SPACE.
... suggests that they are composed of ice , and this explanation is now universally accepted . The Martian ice caps , however , must be far thinner than the ... suggested that the planet's characteristic redness is 126 THE EXPLORATION OF SPACE.
Pagina 132
... suggested that on Mercury will be both the coldest and the hottest points in the Solar System : the night temperature may be as low as -450 degrees F. - not far short of the absolute zero . The surface of Mercury is probably very ...
... suggested that on Mercury will be both the coldest and the hottest points in the Solar System : the night temperature may be as low as -450 degrees F. - not far short of the absolute zero . The surface of Mercury is probably very ...
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