The Exploration of SpaceHarper, 1951 - 199 pagini |
Din interiorul cărții
Rezultatele 1 - 3 din 29
Pagina 35
Arthur Charles Clarke. of the future . Many are already known , in fact , but we cannot yet build the motors to harness them ... known facts are correctly marshalled — a much more difficult feat than may be imagined— and a certain line of ...
Arthur Charles Clarke. of the future . Many are already known , in fact , but we cannot yet build the motors to harness them ... known facts are correctly marshalled — a much more difficult feat than may be imagined— and a certain line of ...
Pagina 67
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ...
... known , plants absorb carbon dioxide ( in the presence of sunlight ) and , after converting it to starch , liberate oxygen . Although this idea is an attractive one at first sight , it loses some of its charm when one considers the ...
Pagina 134
... Known as the asteroids ( an unfortu- nate word , as it means literally “ little stars ” ) the largest of these worlds is only 480 miles in diameter , and the smallest we can detect cannot be more than a mile or two across . They have ...
... Known as the asteroids ( an unfortu- nate word , as it means literally “ little stars ” ) the largest of these worlds is only 480 miles in diameter , and the smallest we can detect cannot be more than a mile or two across . They have ...
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