The Exploration of SpaceHarper, 1951 - 199 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 29
Pagina 145
... structure can therefore be held to a rigid shape , and will carry considerable loads , if the pressure excess between inside and out is even a very small fraction of an atmosphere . Probably the largest gas - supported structure yet ...
... structure can therefore be held to a rigid shape , and will carry considerable loads , if the pressure excess between inside and out is even a very small fraction of an atmosphere . Probably the largest gas - supported structure yet ...
Pagina 153
... structure need have only enough strength to maintain its stiffness . Indeed , the optical elements might be miles apart , if need be , with no physical connexion at all . This would make it possible , for the first time , to build ...
... structure need have only enough strength to maintain its stiffness . Indeed , the optical elements might be miles apart , if need be , with no physical connexion at all . This would make it possible , for the first time , to build ...
Pagina 168
... structure of the universe through the screen of stars which hid them from the rest of space . As will be seen from the examples in Plate XIII , stars vary greatly among themselves in physical structure , as well as in size and ...
... structure of the universe through the screen of stars which hid them from the rest of space . As will be seen from the examples in Plate XIII , stars vary greatly among themselves in physical structure , as well as in size and ...
Cuprins
The Shaping of the Dream | 1 |
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
Drept de autor | |
16 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 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