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英文字典中文字典相关资料:


  • Mars By the Numbers - NASA Solar System Exploration
    Mars is the fourth planet from the Sun, and the seventh largest It’s the only planet we know of inhabited entirely by robots
  • Planet Compare - NASA Solar System Exploration
    NASA’s real-time science encyclopedia of deep space exploration Our scientists and far-ranging robots explore the wild frontiers of our solar system
  • In Depth | Our Solar System – NASA Solar System Exploration
    Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids
  • In Depth | Phobos – NASA Solar System Exploration
    It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen Phobos is nearing Mars at a rate of six feet (1 8 meters) every hundred years; at that rate, it will either crash into Mars in 50 million years or break up into a ring
  • Mars 3D Model – NASA Solar System Exploration
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  • RPS 3D Viewer - NASA Solar System Exploration
    NASA Solar System Exploration Our Galactic Neighborhood Solar System Planets Moons Asteroids, Comets Meteors More
  • In Depth | Moons – NASA Solar System Exploration
    Of the terrestrial (rocky) planets of the inner solar system, neither Mercury nor Venus have any moons at all, Earth has one and Mars has its two small moons In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons
  • Bibliography - NASA Solar System Exploration
    We use a best of approach with images, selecting a key set of images that best tell the story of the planet, celestial object or spacecraft Comprehensive planetary image libraries can be found at http: photojournal jpl nasa gov and http: hubblesite org gallery
  • Jupiter - NASA Solar System Exploration
    Facts About Jupiter Jupiter is the largest and oldest planet in our solar system If Jupiter was a hollow shell, 1,000 Earths could fit inside But the "King of Planets" is no lumbering giant — Jupiter has the shortest day in the solar system, taking about 9 9 hours to spin around once on its axis
  • Spacecraft Technology | VERITAS Tabs - VERITAS Tabs – NASA Solar . . .
    VERITAS is a solar-powered Venus orbiter with many similarities to NASA's MAVEN spacecraft at Mars After arriving at Venus, the mission will use aerobraking to help slow the spacecraft and reshape its orbit





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