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The Question

(Submitted November 10, 1997)

How long do stars live? I am 7 years old.

The Answer

Stars live different lengths of time, depending on how big they are. A star like our Sun lives for about 10 billion years, while a star which weighs twenty times as much lives only 10 million years, about a thousandth as long.

David Palmer
for Ask an Astrophysicist

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