Fun in the Sun: Test Your Solar Smarts

The sizzling star at the center of our solar system makes life possible. But how much do you know about our sun?
Take our quiz to test your solar smarts.
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Venus transit as seen from Langdon, N.D., during sunset. "It made it out from the clouds to hit the horizon," KJS wrote on his <a href="http://www.flickr.com/photos/wolf911/">Flickr site</a>. "Officially the last shot."
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