Space Travel: A HistoryHarper & Row, 1985 - 308 pagini |
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Pagina 3
... Earth . Another thinker , Philolaus , went a step further and proposed that the Earth , the Sun , the Moon , the stars , and the planets revolved around a great sphere of fire , the center of the universe . The Pythagoreans encountered ...
... Earth . Another thinker , Philolaus , went a step further and proposed that the Earth , the Sun , the Moon , the stars , and the planets revolved around a great sphere of fire , the center of the universe . The Pythagoreans encountered ...
Pagina 5
... Earth was at the center , and was immovable , with the Moon , The Pythagoreans believed in a spherical Earth that revolved around a central sphere of fire . A counter Earth , between the two spheres , protected the Earth from the ...
... Earth was at the center , and was immovable , with the Moon , The Pythagoreans believed in a spherical Earth that revolved around a central sphere of fire . A counter Earth , between the two spheres , protected the Earth from the ...
Pagina 67
... Earth floating on water . Later Greek astronomers improved upon this . Pythagoras , born in 572 B.C. , correctly believed in a spherical Earth , and implied that the universe might be spherical too — an idea that appeals to many modern ...
... Earth floating on water . Later Greek astronomers improved upon this . Pythagoras , born in 572 B.C. , correctly believed in a spherical Earth , and implied that the universe might be spherical too — an idea that appeals to many modern ...
Cuprins
A THOUSAND YEARS OF ROCKETRY | 22 |
PIONEERS OF SPACE TRAVEL | 40 |
THE LEGACY OF THE PIONEERS | 60 |
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Termeni și expresii frecvente
aboard Aeronautics Air Force aircraft airplane altitude American Apollo Apollo 11 April Army astronauts Astronomy atmosphere August became boosters Braun British camera carried carrier Center Columbia command craft crew designed developed diameter docking Earth experiments exploration feet long fired flight tests flown fuel Gemini German Goddard Hermann Oberth ICBM inches interplanetary July Jupiter Kennedy Space Center landing later launcher liquid oxygen lunar maneuvering Mars ment miles per hour military mission module Moon motor NASA National Navy Oberth October operational orbit parachute payload Peenemünde pilot planets planned pounds of thrust propellant propulsion range re-entry rocket engines rocketry Russians Salyut satellite Saturn Saturn 1B scientists shuttle Skylab solid-propellant sounding rockets Soviet Soyuz space flight space station space travel spacecraft Spacelab Sputnik stage surface tank target tion Tsiolkovsky United unmanned velocity Viking voyage weapon weighed Wernher von Braun World York
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