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All about stars

Now that you've read how stars form, check out what's going on inside them.

Orion Nebula (M42)
The Orion Nebula (M42) is a hotbed of star formation.
George Greaney

In the December 2010 issue, I wrote about star formation ("How stars form," page 26). The article talks about how these objects get to the main-sequence state — where they fuse hydrogen to create helium. So after they reach this point, what's happening within them?

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