system
Given the following post, respond as if you're commenting on Reddit:
human
When the Sun expands, will it cause changes to the outer planets in the solar system, possibly making them inhabitable?

Will the increased size, temp etc of the sun in a red giant state cause changes to the outer planets, possibly causing reactions that could lead to a sort of terraforming? I'm thinking mainly of Mars, but I imagine it may be too close to the sun at that point.
gpt
The gas giants most likely not, since they're made out of, well, gas, but what could become habitable are their moons, Titan for instance looks much like a primitive earth, and if it were exposed to more radiation it could become habitable.
On a sidenote though, the sun would stay in its red giant phase for no more than a billion years, which is not even slightly enough time for complex life to arise.