The Exploration of SpaceTemple Press, 1951 - 198 pagini |
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Pagina 26
... important rôle in the conquest of space , since almost certainly the first spaceships will be purely automatic - and thus expendable . The " exhaust speed " of modern liquid - fuelled rockets is of the order of 5,000 m.p.h. or even ...
... important rôle in the conquest of space , since almost certainly the first spaceships will be purely automatic - and thus expendable . The " exhaust speed " of modern liquid - fuelled rockets is of the order of 5,000 m.p.h. or even ...
Pagina 45
... important difference that whereas the shell acquires its velocity in a few feet under an enormous acceleration , the spaceship has thousands of miles in which to build up speed at a rate which human passengers could withstand . Still ...
... important difference that whereas the shell acquires its velocity in a few feet under an enormous acceleration , the spaceship has thousands of miles in which to build up speed at a rate which human passengers could withstand . Still ...
Pagina 154
... important factor determining the possible size of micro - organisms ( and indeed larger creatures ) . Its removal might produce some interesting results , though whether we could breed amoeba as big as footballs remains to be seen ! The ...
... important factor determining the possible size of micro - organisms ( and indeed larger creatures ) . Its removal might produce some interesting results , though whether we could breed amoeba as big as footballs remains to be seen ! The ...
Cuprins
FRONTISPIECE Automatic Rocket Surveying Mars PLATE I HighAltitude ManCarrying Rocket | 3 |
Spaceships Refuelling In Free Orbit | 4 |
The Earth and its Neighbours | 9 |
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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