The Exploration of SpaceTemple Press, 1951 - 198 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 58
Pagina 9
... miles is an inconceivably great distance - yet there are also men whọ think nothing of travelling ten thousand miles in a few days . As speeds of transport have increased , so our sense of distance has altered . Australia can never be ...
... miles is an inconceivably great distance - yet there are also men whọ think nothing of travelling ten thousand miles in a few days . As speeds of transport have increased , so our sense of distance has altered . Australia can never be ...
Pagina 10
... miles away and almost a mile across ; 36 and 67 miles from it , respectively , circle Mercury and Venus . Mercury is 15 feet across , Venus 38— a little smaller than the Earth . Beyond the Earth's orbit is Mars , 20 feet in diameter and ...
... miles away and almost a mile across ; 36 and 67 miles from it , respectively , circle Mercury and Venus . Mercury is 15 feet across , Venus 38— a little smaller than the Earth . Beyond the Earth's orbit is Mars , 20 feet in diameter and ...
Pagina 41
... miles an hour . Now the Moon has , of course , its own gravitational field , which may be regarded as a much smaller version of the Earth's . Returning to our analogy on page 31 , it is as though some distance away from the 4,000- miles ...
... miles an hour . Now the Moon has , of course , its own gravitational field , which may be regarded as a much smaller version of the Earth's . Returning to our analogy on page 31 , it is as though some distance away from the 4,000- miles ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
Drept de autor | |
28 alte secțiuni nu sunt arătate
Alte ediții - Afișează-le pe toate
Termeni și expresii frecvente
acceleration already asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical climb completely course crew degrees F difficult direction distance Earth energy enormous escape velocity exploration extremely fact Figure flywheel free orbit fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles imagine important interplanetary flight interplanetary travel interstellar involved ionosphere journey Jupiter landing light light-years lunar 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 Propontis 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