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What features does a comet have?

Question asked by: knowitall

A comet is often called a dirty snowball, and this is not a bad description!

They are small objects, only a few kilometres across, and are mainly water.

This water is mixed with some gases like carbon dioxide, ammonia and methane.

Thus a dirty snowball is a good description.

They all orbit the Sun, and have a regular orbit.

Near the sun a head and coma or tail are easy to spot as the gases warm and burn up near the sun due to the heat.

The most famous is Halley's comet.

By: Unknown
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