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 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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able acceleration actual already appear astronautics astronomers atmosphere atomic become body build carry certainly Chapter close completely consider considerable course deal developed difficult direction discovered discuss distance Earth effect energy escape exist exploration extremely fact fall field Figure fuel give given gravity greater heat human hundred idea imagine important impossible increase interesting interplanetary involved journey known landing least less light limit live look lunar Mars material matter means miles minutes Moon motors necessary never observed once orbit oxygen perhaps period planets Plate possible practical present pressure probably problem produce purely radio reach reason relatively remain rocket round satellite scientific seems seen ship shown simple Solar space spaceship speed stars stations structure surface telescope temperature thousand Universe velocity Venus weight whole