Wednesday, October 24, 2007

What is the Milky Way?

It is the name given to our Galaxy, which is shaped like a disc with a central bump. It is also the name for the dense band of stars that spans the sky. As a galaxy, the Milky Way is actually a giant, as its mass is probably between 750 billion and one trillion solar masses, and its diameter is about 100,000 light years.

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