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Last Post 10/22/2008 12:58 PM by Kris Sigsbee

The Sun as a Star

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10/22/2008 12:19 PM
Jeremy Bednorz of Mountain View Middle School in Alamogordo, New Mexico asks, "Does the sun grow larger as it ages?".

Kris Sigsbee

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10/22/2008 12:58 PM
Hi Jeremy, That is a good question, and the answer is yes, the Sun will grow larger as it ages. As our Sun exhausts its supply of hydrogen for nuclear fusion reactions, it will eventually evolve into a red giant star as other types of nuclear reactions take over. When this happens, the Sun will expand to envelope the Earth. Fortunately for us, this will not happen for a very, very, very, very long time! Kris