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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) Asteroids are rocky, metallic, or icy bodies with no atmosphere, and are broadly classified into C-type (carbonaceous), M-type (metallic), or S-type
  • 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
  • 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
  • NASA tracking 130ft plane-sized asteroid approaching Earth tomorrow - MSN
    NASA is currently tracking a plane-sized asteroid set to zip past the Earth on June 18 at a whopping 8,768 miles per hour
  • 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 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
  • List of exceptional asteroids - Wikipedia
    The third-largest asteroid with an accurately measured mass, because it has moons, is 87 Sylvia at (14 76 ± 0 06) × 1018 kg Other large asteroids with masses measured from their moons are 107 Camilla and 130 Elektra [3][14][1] For a more complete list, see List of Solar System objects by size
  • Asteroid Alerts
    Welcome to Asteroid Alerts, your source for tracking Near-Earth Objects and potential asteroid threats Our system continuously monitors data from Minor Planet Center and NASA Sentry to keep you informed Current monitoring shows: 1 close approaches within 5 lunar distances and 3 objects with elevated risk factors
  • NASA Is Tracking a Massive Asteroid Headed Towards Earth
    NASA is tracking a massive asteroid headed towards Earth named 2021 R16, which will come remarkably close to our planet as it hurtles through space
  • Skyscraper-sized asteroid to race past Earth at high speed | Fox News
    A massive asteroid nearly the size of a New York skyscraper will make a close approach, or pass, by Earth in the early hours of Sept 18, according to scientists They say the asteroid, officially





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