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Scientists recently observed a system that looks a lot like our own, only at a different place in its life cycle: its main star is a cold, dead white dwarf.
These findings were published in Nature on October 13.
“If humankind wanted to move to a moon of Jupiter or Saturn before the Sun fried the Earth ... we’d still remain in orbit around the Sun, although we would not be able to rely on heat from the Sun as a white dwarf for very long.”
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Logistically, it would probably require some form of technology to create new heating systems on a distant body, plus all the other challenges of living off-Earth.
But that’s for the humans living billion of years from now to figure out.