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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
  • 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 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
  • 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
  • Skyscraper-sized asteroid to race past Earth at high speed | Fox News
    Asteroids are rocky formations of the solar system from billions of years ago that are seen orbiting the sun and can be different sizes NASA estimates more than 1 3 million asteroids are in
  • 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
  • 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 Launcher - Neal. fun
    An asteroid simulator that lets you design your own asteroid and launch it at Earth Simulate the effects of an asteroid impact on Earth's population
  • NASA says yes, an asteroid buzzing by in 2032 could hit Earth
    An asteroid that measures up to 300 feet across could smack into Earth in 2032, and while NASA says the chances of a collision are “extremely low,” the probability has been increasing since





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