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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 that orbits within the inner Solar System or is co-orbital with Jupiter (Trojan asteroids) These objects are larger than a meteoroid (thus 1 meter or larger) and are neither a planet nor an identified comet
  • Eyes on Asteroids - 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 43,000 NEOs (and counting)
  • 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 Facts - Science@NASA
    You're looking at a real-time visualization of every known asteroid or comet classified as a Near-Earth Object, or NEO Most asteroids orbit our Sun between Mars and Jupiter within the main asteroid belt
  • When Is the Next Asteroid Predicted to Hit the Earth?
    Is it likely for an asteroid to hit Earth anytime soon? In this article, we’ll answer the most burning questions about potentially hazardous asteroids
  • What Is an Asteroid? | NASA Space Place – NASA Science for Kids
    The objects in the asteroid belt never had the chance to be incorporated into planets They are leftovers from that time long ago when planets formed Are all asteroids the same? No way! Because asteroids formed in different locations at different distances from the sun, no two asteroids are alike Here are a few ways that they differ:
  • What Is an Asteroid? Size, Composition, and Orbit Explained
    An asteroid is a small rocky or metallic object that orbits the Sun Most asteroids are remnants of the material that formed the planets about 4 6 billion
  • Next Five Asteroid Approaches - NASA Jet Propulsion Laboratory (JPL)
    The Asteroid Watch dashboard tracks asteroids and comets that will make relatively close approaches to Earth The dashboard displays the date of closest approach, approximate object diameter, relative size and distance from Earth for each encounter
  • Will Apophis Hit Earth in 2029 | Apophis Asteroid Size Risk . . .
    Here’s everything you need to know about Apophis, the massive asteroid once predicted to crush into the Earth 😱 See if you should cancel your plans on April 13, 2029 (and later)





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