How to Move The Planet Earth To Save It From The Sun
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On the timescale of hundreds of millions of years the sun is increasing in luminosity, and may one day render the Earth uninhabitable. Is it possible to envisage a way to move the entire planet further from the Sun to prevent this fate?
David Brin: Let's Lift The Earth
http://davidbrin.blogspot.com/2014/11/lets-lift-earth.html
The Wandering Earth
https://en.wikipedia.org/wiki/The_Wandering_Earth
Astronomical engineering: a strategy for modifying planetary orbits
https://arxiv.org/pdf/astro-ph/0102126.pdf