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Old 06-13-2016, 05:41 AM
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Originally Posted by eburacum45 View Post
When the Sun leaves the Main sequence it will star losing mass comparatively rapidly, due to a vastly increased solar wind. Some estimates say that this loss will be enough to move the Earth's orbit out beyond the edge of the Sun's red giant phase; others aren't so sure.
By that stage the Earth will have lost its magnetic field due to cooling of the core, so it may no longer have an atmosphere.