The Exploration of SpaceHarper, 1951 - 199 pagini |
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Pagina 9
... PLUTO NEPTUNE JUPITER THE PLANETS AND THEIR SATELLITES THE ASTEROIDS URANUS SUN JUPITER SATURN 200 400 600 800 1,000 MILLIONS OF MILES SUN MERCURY VENUS EARTH MARS 20 40 60 80 100 MILLIONS OF MILES PLUTO URANUS NEPTUNE SATURN 0 20 40 60 ...
... PLUTO NEPTUNE JUPITER THE PLANETS AND THEIR SATELLITES THE ASTEROIDS URANUS SUN JUPITER SATURN 200 400 600 800 1,000 MILLIONS OF MILES SUN MERCURY VENUS EARTH MARS 20 40 60 80 100 MILLIONS OF MILES PLUTO URANUS NEPTUNE SATURN 0 20 40 60 ...
Pagina 10
... Pluto depart seriously from this rule , their orbits being apprecia- bly elliptical . That of Pluto , in fact , is so eccentric that it can sometimes come closer to the Sun than does Neptune . This , then , is the family of planets of ...
... Pluto depart seriously from this rule , their orbits being apprecia- bly elliptical . That of Pluto , in fact , is so eccentric that it can sometimes come closer to the Sun than does Neptune . This , then , is the family of planets of ...
Pagina 138
... Pluto was discovered as a result of a long search by the Lowell Observatory . The discovery was based on mathematical calculations by Dr. Lowell , but it has now been found that Pluto cannot be the planet whose existence he pre- dicted ...
... Pluto was discovered as a result of a long search by the Lowell Observatory . The discovery was based on mathematical calculations by Dr. Lowell , but it has now been found that Pluto cannot be the planet whose existence he pre- dicted ...
Cuprins
The Earth and Its Neighbours | 7 |
The Rocket | 17 |
Escaping from Earth | 30 |
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acceleration already asteroids astronautics astronomers atmosphere body bricks British Astronomical Association 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 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 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