The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 34
... build up escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him over a hill . To surmount our ...
... build up escape velocity as quickly as possible- and then to cut the rockets and " coast " . A commonplace but accurate analogy is given by the cyclist who builds up enough speed on the level to take him over a hill . To surmount our ...
Pagina 36
... build a rocket capable of carrying a certain payload , and make that payload another rocket carrying the same percentage of fuel , then when the smaller machine has burned its fuel it will have achieved twice the speed that either ...
... build a rocket capable of carrying a certain payload , and make that payload another rocket carrying the same percentage of fuel , then when the smaller machine has burned its fuel it will have achieved twice the speed that either ...
Pagina 153
... build instruments which could measure the diameters of normal - sized stars . It might even become possible to detect planets of the nearer stars , something quite out of the question with earth- based equipment . Since 1945 ...
... build instruments which could measure the diameters of normal - sized stars . It might even become possible to detect planets of the nearer stars , something quite out of the question with earth- based equipment . Since 1945 ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks 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 giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing light light-years lunar Mare Imbrium 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 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 tion trolley Uranus voyage weight