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About 5 billion years from now, the Sun will begin to swell into a red giant. This will cause some problems, because life on a planet orbiting a red giant is hard. Even if Earth isn't engulfed by t...
#1: Attribution notice removed
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System
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2020-06-01T14:13:55Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/q/114395 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/