Could Jupiter moon Europa become habitable when the sun enters its red giant stage?
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It is estimated that in about five billion years, our sun will enter its red giant stage. During that phase it will expand and completely engulf Mercury, Venus and possible Earth. Earth will either be destroyed or become uninhabitable.
Will there be a phase during this development where the sun's energy at the distance of Jupiter becomes strong enough to turn the surface of Europa into a liquid ocean but not yet strong enough to completely evaporate it? When that happens would Europa be habitable for humans and if yes for how long?
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