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(, Sun 1 Apr 2001, 1:00)
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says 1.1 billion. www.frontiernet.net/~docbob/sun.htm
But I think the difference is between when the sun get's hot enough to burn away the atmosphere to when it actually envelopes the earth
(, Wed 11 Aug 2010, 15:24, 2 replies, latest was 16 years ago)
Also, wiki.answers.com/Q/When_the_sun_burns_out_what_will_happen
(, Wed 11 Aug 2010, 15:27, Reply)
On the other hand, Wikipedia gives about 5 billion years before it becomes a red giant: en.wikipedia.org/wiki/Sun#Life_cycle . But I know not everyone trusts Wikipedia, so I checked NASA. They say 5 billion, too www.nasa.gov/worldbook/sun_worldbook.html .
(, Wed 11 Aug 2010, 15:40, Reply)
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