The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 19
Pagina 51
... fall back to earth along a line extending eastwards from the launching site , the actual points of impact depending on the height of release and the velocities at separation . In extreme cases , the last step but one might go almost ...
... fall back to earth along a line extending eastwards from the launching site , the actual points of impact depending on the height of release and the velocities at separation . In extreme cases , the last step but one might go almost ...
Pagina 52
... fall , but this is perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps ...
... fall , but this is perhaps an unfortunate phrase because the word " fall " usually implies " downwards " . The spaceship , as we have seen , could be moving upwards or horizontally while under the influence of gravity alone . So perhaps ...
Pagina 73
... fall unhindered , it would crash into the Moon at about 5,200 m.p.h. The problem of landing on the Moon is one which , despite its obvious importance , has not received as much attention as it should . Clearly it can only be done by ...
... fall unhindered , it would crash into the Moon at about 5,200 m.p.h. The problem of landing on the Moon is one which , despite its obvious importance , has not received as much attention as it should . Clearly it can only be done by ...
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