Astronomical Engineering: A Strategy for Modifying Planetary Orbits

The Sun’s gradual brightening will seriously compromise the Earth’s biosphere within ~ 1E9 years. If Earth’s orbit migrates outward, however, the biosphere could remain intact over the entire main-sequence lifetime of the Sun.

D. G. Korycansky, Gregory Laughlin, Fred C. Adams

Apparently the solution to everything getting warmer is to just move the planet.