Asteroid meaning

ăstə-roid
The definition of an asteroid is a rocky mass that orbits the sun.
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More than 1,800 asteroids have been identifed in the solar system.
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Asteroids are made from one of three types of materials:
  • C-type - Made of carbon containing rocks.
  • S-type - Made of silicon-based rocks.
  • M-types - Large asteroids which contain metal.
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Starlike; shaped like a star or starfish.
adjective
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Scientists believe that asteroids may be the remains of the formation of the solar system - the Big Bang explosion. The material that was not pulled into one of the planets remained in space and began its own cooling process. The material that did not get pulled into a planetary gravitational field continues to grow as an asteroid.
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The most common source of asteroids is the main asteroid belt between Mars and Jupiter.
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The largest asteroid on record is Ceres which is large enough to be considered a dwarf planet, amounting to approximately 27% of the total mass of the main belt of asteroids that lie between Mars and Jupiter.

A small planet whose orbit is between Mars and Jupiter is an example of an asteroid.

noun
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Any of numerous small solar system bodies that revolve around the sun, with orbits lying chiefly between Mars and Jupiter and characteristic diameters roughly between one and several hundred kilometers.
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Star-shaped.
adjective
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Any of the thousands of relatively small, irregularly shaped objects orbiting the sun typically between Mars and Jupiter.
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Any of numerous small solar system bodies that orbit the Sun primarily in the asteroid belt , a region between the orbits of Mars and Jupiter. Asteroids are intermediate in size between planets and meteoroids with diameters that measure between approximately one hundred and several hundred kilometers. While more than 1,800 asteroids have been cataloged, and as many as a million or more smaller ones may exist, their total mass has been estimated to be less than three percent of the Moon's. Asteroids are thought to be left over from the early formation of the solar system, when planetesimals in a protoplanetary disk were scattered after coming under Jupiter's gravitational influence. The continuing collision of planetesimals that remained between Jupiter and Mars caused many of them to fragment, creating the asteroids that exist today.
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(astronomy) A naturally occurring solid object, which is smaller than a planet and is not a comet, that orbits a star.
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(astronomy) In the Solar system, such a body that orbits within the orbit of Jupiter.
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(zoology) Any member of the taxonomic class Asteroidea; a starfish.
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Origin of asteroid

  • From Greek asteroeidēs starlike astēr star ster-3 in Indo-European roots -oeidēs -oid

    From American Heritage Dictionary of the English Language, 5th Edition

  • Borrowing from Ancient Greek ἀστεροειδής (asteroeidēs), from ἀστήρ (astēr, “star”) + εἶδος (eidos, “form”).

    From Wiktionary