The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 14
Pagina 12
... moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the Solar System is ...
... moving in its orbit at 107,000 m.p.h. , the Earth at a more modest 68,000 and Pluto at a mere 10,000 m.p.h. The second important point is that almost all the planets lie in or very near the same plane , so that the Solar System is ...
Pagina 52
... moving freely in empty space , with its motors cut off , is not resisting gravity : on the contrary , it is letting gravity take it where it will . It is sometimes said to be in free fall , but this is perhaps an unfortunate phrase ...
... moving freely in empty space , with its motors cut off , is not resisting gravity : on the contrary , it is letting gravity take it where it will . It is sometimes said to be in free fall , but this is perhaps an unfortunate phrase ...
Pagina 100
... moving past the portholes . Even then the impression would be a purely psychological one — of the kind most people have experienced when sitting in a train and seeing another apparently moving on a parallel track . In those ...
... moving past the portholes . Even then the impression would be a purely psychological one — of the kind most people have experienced when sitting in a train and seeing another apparently moving on a parallel track . In those ...
Cuprins
THE SHAPING OF THE DREAM | 1 |
Automatic Rocket Surveying Mars | 4 |
THE EARTH AND ITS NEIGHBOURS | 9 |
Drept de autor | |
22 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
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