The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 32
... shown in cross - section in Figure 9 , and an enlarged view of what might be called its lower slopes is given on the right of the diagram . Imagine that it is made of some smooth , hard material like perfectly frictionless glass , and ...
... shown in cross - section in Figure 9 , and an enlarged view of what might be called its lower slopes is given on the right of the diagram . Imagine that it is made of some smooth , hard material like perfectly frictionless glass , and ...
Pagina 83
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
... shown at ( a ) . Now let us suppose that calculation has shown that the velocity should be along the line AC . Elementary dynamics tells us that to give the ship this required velocity , we must impart to it a speed in the direction BC ...
Pagina 130
... shown in Plate X , which is drawn on a Mercator projection . It should be explained that the details shown here have been collected over many years of patient observation , by many observ- ers . The disc of the planet also shows a vast ...
... shown in Plate X , which is drawn on a Mercator projection . It should be explained that the details shown here have been collected over many years of patient observation , by many observ- ers . The disc of the planet also shows a vast ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium 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 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 tion trolley Uranus voyage weight