Could life on earth survive after the sun becomes a white dwarf?
It's my first time writing an original story and I have this idea, but I don't know if it could be scientifically feasible. My story would be medieval fantasy with magic, but I wanted to add a twist in it: at the end it becomes clear that the setting isn't another world, it's earth after the sun has gone out and became a white dwarf, which didn't happen because of natural causes but due to magic/fantasy things. So yeah, it's going to be a mix.
Anyway, I didn't want to make it too scientific, what I wanted to do was that humanity barely survived the red giant phase of the sun with technology (it doesn't matter what kind, the people that now live on earth don't know what technology is anyway), and then adapted to live in a world much colder than before and slowly life began again. But I read online that to be habitable, a planet must be really close to the white dwarf. Would it be too far-fetched if the earth was somehow pulled towards the sun with technology or some other thing?
What do you think, is this idea too crazy and unbelievable? Thank you for your help!
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Maybe if the magic/technology let them move the orbit out a ways during the red giant phase, and then in much closer as it became a white dwarf
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