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What asteroids are made of?

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The asteroids that are nearest the Sun are mostly made of carbon, with smaller amounts of nitrogen, hydrogen and oxygen, while the ones further away are made up of silicate rock. Silicates are very common on Earth and in the Solar System. read more

Some asteroids are almost as large as planets, and astronomers sometimes argue about whether really big asteroids ought to be called planets or not. Asteroids are made of rock, metals and other elements. read more

Asteroids are made of rock and metal and broken away pieces of planets. They are grouped into three categories: Stony, Iron-Nickel, and a mixture of the two. Most asteroids that we know about fall into the first category, and are made of Silicates. read more

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