The sun will slowly heat up in the course of its natural stellar evolution.
Moving the earth is one possible way to save us from frying.
Another is to launch reflective satellites into orbit. How difficult would it be? Is it more or less difficult than cosmic pinball?
Artificially induce snowball earth. Glaciers and ice caps cause high albedo.
Or mirrors on the surface of the earth rather than orbit? Perhaps floating on the ocean?
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