The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 46
... greater than that needed merely to escape - though in most cases only slightly greater . ( 2 ) When it approaches the planet of destination , it must use rocket power again to match the speed of the planet , and to lower itself safely ...
... greater than that needed merely to escape - though in most cases only slightly greater . ( 2 ) When it approaches the planet of destination , it must use rocket power again to match the speed of the planet , and to lower itself safely ...
Pagina 129
... greater distance from the Sun , that life would be severely handicapped . At noon during the summer , temperatures of 80 degrees F. have been recorded by the thermocouple , and the equatorial regions of the planet must be not much ...
... greater distance from the Sun , that life would be severely handicapped . At noon during the summer , temperatures of 80 degrees F. have been recorded by the thermocouple , and the equatorial regions of the planet must be not much ...
Pagina 163
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
... greater than terrestrial ones , interstellar distances are a million times greater still . Even light , which can pass from the Sun to Pluto in a few hours , takes over four years to reach the nearest of the stars . It is not surprising ...
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