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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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  • 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)
  • Asteroid as large as 5 cruise ships will soar past Earth this . . .
    An asteroid as large as five cruise ships is barreling towards Earth at 5 6 miles per second Civilization thankfully isn’t in any imminent danger, but the cosmic debris will still come close
  • 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)
  • 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 Tracker - Near Earth Objects (NEO) Live Map | NASA Data
    Track asteroids and near-Earth objects in real-time Live NEO positions, close approaches, potentially hazardous asteroids (PHA) NASA JPL asteroid data on 3D globe
  • Large asteroid to pass Earth safely on June 27
    A large asteroid – some 60 times wider than the Chelyabinsk meteor that exploded through our atmosphere and broke windows in 6 Russian cities in 2013 – will pass Earth safely on June 27
  • 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
  • Large asteroid will safely pass by Earth on Saturday - MSN
    A building-sized asteroid will pass safely by Earth on June 27 Dozens of near-Earth objects like this one routinely pass relatively close to Earth without incident
  • Asteroids: News, features and articles | Live Science
    Discover the rocky objects orbiting our sun with the latest asteroid news, features and articles
  • What are asteroids? | Space
    Using NASA definitions, an asteroid is "A relatively small, inactive, rocky body orbiting the sun," while a comet is a "relatively small, at times active, object whose ices can vaporize in





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