The Exploration of SpaceHarper, 1951 - 199 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 14
Pagina 11
... live if the pressure of the surround- ing air falls below about one - half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the ...
... live if the pressure of the surround- ing air falls below about one - half of its sea - level value , and most men would be practically incapacitated well before this figure was reached . As we ascend from the Earth's surface , the ...
Pagina 41
... live there was another pit , this time only 170 miles deep . Dropping into this pit as it approached the Moon ( or in more conventional terms , falling in the Moon's gravitational field ) the rocket would gain speed and , at the moment ...
... live there was another pit , this time only 170 miles deep . Dropping into this pit as it approached the Moon ( or in more conventional terms , falling in the Moon's gravitational field ) the rocket would gain speed and , at the moment ...
Pagina 160
... live normal lives yet carry out zero - gravity experiments when- ever they wished . Other satellites - particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
... live normal lives yet carry out zero - gravity experiments when- ever they wished . Other satellites - particularly those used for astronomical research , where instruments have to be kept rigidly fixed for long periods in an unvarying ...
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