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asteroid    音标拼音: ['æstɚ,ɔɪd]
n. 小游星,小行星,海盘车
a. 星状的

小游星,小行星,海盘车星状的

asteroid
adj 1: shaped like a star [synonym: {asteroid}, {star-shaped}]
n 1: any of numerous small celestial bodies composed of rock and
metal that move around the sun (mainly between the orbits
of Mars and Jupiter)

Asteroid \As"ter*oid\, n. [Gr. ? starlike, starry; 'asth`r star
e'i^dos form: cf. F. ast['e]ro["i]de. See {Aster}.]
A starlike body; esp. one of the numerous small planets whose
orbits lie between those of Mars and Jupiter; -- called also
{planetoids} and {minor planets}.
[1913 Webster]


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  • Asteroid - Wikipedia
    An asteroid is a minor planet —an object larger than a meteoroid (thus 1 meter or larger) that is neither a planet nor an identified comet —that orbits within the inner Solar System or is co-orbital with Jupiter (Trojan asteroids)
  • Eyes on Asteroids - Home - NASA JPL
    You are looking at a real-time visualization of every known asteroid or comet that is classified as a Near-Earth Object (NEO) With asteroids represented as blue points, and comets as white points, our database is updated daily to give you approximately 42,000 NEOs (and counting)
  • NASA tracking skyscraper-sized asteroid approaching Earth today - MSN
    NASA is monitoring a building-sized asteroid that’s hurtling towards our planet at around 30,200 miles per hour, according to the Center for Near Earth Object Studies (CNEOS)
  • Asteroids - Science@NASA
    Asteroids, sometimes called minor planets, are rocky, airless remnants left over from the early formation of our solar system about 4 6 billion years ago Most asteroids can be found orbiting the Sun between Mars and Jupiter within the main asteroid belt
  • Asteroid | Definition, Size, Facts | Britannica
    Asteroid, any of a host of small bodies, about 1,000 km (600 miles) or less in diameter, that orbit the Sun primarily between the orbits of Mars and Jupiter in a nearly flat ring called the asteroid belt Hundreds of thousands of asteroids are known
  • Asteroid belt - Wikipedia
    It contains a great many solid, irregularly shaped bodies called asteroids or minor planets The identified objects are of many sizes, but much smaller than planets, and, on average, are about one million kilometers (or six hundred thousand miles) apart
  • Asteroid Alerts
    From asteroid flybys to Mars landing tests, new discoveries from Webb and Hubble, and ESA astronaut Sophie Adenot capturing shooting stars from orbit, here’s your monthly roundup from the European Space Agency
  • Asteroid, Alarmingly Named Apophis, Will Pass Close to Earth in 2029
    An asteroid, eerily named Apophis, will pass closer to Earth than many satellites in geosynchronous orbit in 2029 NASA said the asteroid's close approach will alter its orbit and rotation due to
  • A City-Killer Asteroid Just Passed Shockingly Close to Earth . . . - VICE
    The object was small, fast, and hard to spot, which is exactly why near-Earth asteroids remain so unnerving





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