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 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 ...
Pagina 180
... greater and greater volume of space will become accessible to exploration . Before closing this chapter we must deal with two questions which any discussion of interstellar travel inevitably raises . In the first place , despite the ...
... greater and greater volume of space will become accessible to exploration . Before closing this chapter we must deal with two questions which any discussion of interstellar travel inevitably raises . In the first place , despite the ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar 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 Propontis 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