The Exploration of SpacePocket Books, 1979 - 237 pagini Presents a nonscientific explanation of space exploration and a view of future life on other planets. |
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Pagina 47
... speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only- ( 1 ) the speed with which the bricks are thrown out , and ( 2 ) the quantity of bricks thrown out . Common ...
... speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only- ( 1 ) the speed with which the bricks are thrown out , and ( 2 ) the quantity of bricks thrown out . Common ...
Pagina 59
... speed to maintain itself . It fell down- wards , gaining speed as it did so , until it had picked up enough speed to climb upwards again and retrace its orbit . Its path is thus not a circle , but an ellipse . All these cases could be ...
... speed to maintain itself . It fell down- wards , gaining speed as it did so , until it had picked up enough speed to climb upwards again and retrace its orbit . Its path is thus not a circle , but an ellipse . All these cases could be ...
Pagina 60
... speed on the level to take him over a hill . To surmount our imaginary , yet in a sense very real , 4,000 - miles ... speeds and hence rocket speeds will con- tinue 60.
... speed on the level to take him over a hill . To surmount our imaginary , yet in a sense very real , 4,000 - miles ... speeds and hence rocket speeds will con- tinue 60.
Cuprins
Preface to the 1951 Edition | 11 |
Thirty Years Later | 15 |
The Shaping of the Dream | 21 |
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acceleration airless already astronautics astronomers atmo atmosphere body bricks build carry certainly Chapter chemical completely conquest of space consider course crew degrees F difficult direction distance Earth energy enormous escape velocity exist exploration extremely fact Figure fuel Galaxy giant gravitational field gravity heat Hermann Oberth hundred miles idea imagine important interplanetary flight interplanetary travel interstellar ionosphere Jerry Pournelle journey Jupiter landing large number light light-years lunar Mars and Venus Martian means Mercury meteors miles in diameter million minutes missile Moon Moon's motors never normal observed once oxygen payload perhaps planetary planets Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri radar radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-station space-suits space-travel spaceship speed spin stars stations surface take-off telescope temperature thousand thrust tion trolley voyage weight weightless