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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
    Explore the 3D world of Asteroids, Comets and NEOs Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth
  • Newly discovered asteroid 2026 JH2 swung past Earth at 57,000 . . . - MSN
    A small asteroid discovered just eight days ago is set to fly past Earth tonight at a distance of roughly 57,000 miles, well inside the orbit of the Moon The object, designated 2026 JH2, was
  • 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
  • Newly discovered asteroid will make a close, but safe, encounter with . . .
    A newly discovered asteroid will pass within about 56,000 miles of Earth on Monday, significantly closer than the distance between Earth and the moon There is no need to worry or cancel any plans, however
  • 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
  • List of exceptional asteroids - Wikipedia
    For the purposes of this article, "asteroid" refers to minor planets out to the orbit of Neptune, and includes the dwarf planet Ceres, the Jupiter trojans and the centaurs, but not trans-Neptunian objects (objects in the Kuiper belt, scattered disc or inner Oort cloud)
  • 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





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