The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 16
Pagina 20
... involved are very far from being equal . Yet once again the same law of reaction holds . If the gun weighed a thousand times as much as the bullet , it would recoil at a thousandth of the bullet's speed . Now , perhaps , we can consider ...
... involved are very far from being equal . Yet once again the same law of reaction holds . If the gun weighed a thousand times as much as the bullet , it would recoil at a thousandth of the bullet's speed . Now , perhaps , we can consider ...
Pagina 85
... involved they would , if they were ignored , cause a spaceship to be " above " or " below " the planets , at the end of its voyage , by as much as 5,000,000 miles . To correct for this it would be advisable to make a small change of ...
... involved they would , if they were ignored , cause a spaceship to be " above " or " below " the planets , at the end of its voyage , by as much as 5,000,000 miles . To correct for this it would be advisable to make a small change of ...
Pagina 152
... involved in building the 200 - inch telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how ...
... involved in building the 200 - inch telescope on Mount Palomar were not primarily optical ones : they were largely due to the fact that the mirror and its auxiliaries had to remain rigid to a few millionths of an inch , no matter how ...
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