Group U Comets, Meteors And Asteroids

Comets and Asteroids

Comets, meteors and asteroids have several things in common. First, they’re believed to be remnants of the materials that created the Sun and the planets. Basically, they’re leftovers. Comets, meteors and asteroids are too small to be planets. Some are only a few feet in size, while others are a mile or more long.


Comets are mostly made of ice. They are very old. As comets travel close to the Sun, some of the ice melts off and becomes a gas. This melting process causes bits of dust and debris to trail behind the comet. This tail can be seen in the night sky as a bright, quickly-moving light.



Asteroids are mostly made of rock. Asteroids are found in the Asteroid Belt between Mars and Jupiter.

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