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meteoroid    
n. 流星体

流星体

meteoroid
n 1: (astronomy) any of the small solid extraterrestrial bodies
that hits the earth's atmosphere [synonym: {meteoroid},
{meteor}]


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  • Meteoroid - Wikipedia
    Meteoroid collisions with solid Solar System objects, including the Moon, Mercury, Callisto, Ganymede, and most small moons and asteroids, create impact craters, which are the dominant geographic features of many of those objects
  • What’s the Difference Between a Meteoroid, a Meteor, and a Meteorite?
    Most meteoroids that enter the atmosphere burn up completely as meteors In some cases, however, the meteoroid does not completely burn up, and the object actually makes it to Earth’s surface The chunk that has survived its fiery journey is called a meteorite
  • Meteors and Meteorites: Facts - NASA Science
    Meteoroids are space rocks that range in size from dust grains to small asteroids When meteoroids enter Earth’s atmosphere, or that of another planet, at high speed and burn up, they’re called meteors When you see lots if meteors, you’re watching a meteor shower
  • Meteors and Meteorites - NASA Science
    Scientists estimate that about 48 5 tons (44 tonnes or 44,000 kilograms) of meteoritic material falls on Earth each day Almost all the material is vaporized in Earth's atmosphere, leaving a bright trail fondly called "shooting stars " Several meteors per hour can usually be seen on any given night
  • Meteor and meteoroid | Definition Facts | Britannica
    Meteor and meteoroid, respectively, a glowing streak in the sky (meteor) and its cause, which is a relatively small stony or metallic natural object from interplanetary space (meteoroid) that enters Earth’s atmosphere and heats to incandescence
  • Meteoroid - WorldAtlas
    When most people hear the word meteoroid, they think of disaster Explore what meteoroids are, how they form and how risky they actually are to the planet
  • Difference Between Meteoroids, Meteors, Meteorites, Comets, and Asteroids
    Meteoroids are rocky fragments of asteroids, comets, moons, and planetary collisions They are much smaller than asteroids, ranging in size from tiny grains up to a meter Smaller particles are called space dust or micrometeoroids
  • Meteoroid - National Geographic Society
    Meteoroids shed by a comet usually orbit together in a formation called a meteoroid stream A very small percentage of meteoroids are rocky pieces that break off from the moon and Mars after celestial bodies—often asteroids or other meteoroids—
  • METEOROIDS Definition Meaning - Merriam-Webster
    The meaning of METEOROID is a meteor particle itself without relation to the phenomena it produces when entering the earth's atmosphere
  • What Is a Meteoroid? Definition, Differences, and What Happens in Space . . .
    What is a meteoroid, exactly, and why do these small objects matter in astronomy? This guide explains the definition, origin, behavior, and differences between meteoroids, meteors, and meteorites, with the science kept clear and practical What is a meteoroid? Where do meteoroids come from?





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