Worldbuilding

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Creating an artificial magnetosphere (astrobiology.nasa.gov)

submitted 1 month ago by early_riser@lemmy.world to c/worldbuilding@lemmy.world

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TL;DR, you need a magnetosphere to keep the solar wind from stripping your atmosphere. You could create an artificial magnetosphere by placing a really powerful magnet at the first Lagrange point such that the planet is shadowed by the object's magnetotail.

This is a lot simpler than what I had conceived, rings of satellites orbiting the planet and doing... something that keeps the atmosphere stable. Of course there's a lot more to maintaining a terraformed climate than just the magnetosphere, so maybe I'll need those satellites after all.

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[–] early_riser@lemmy.world 3 points 1 month ago* (last edited 1 month ago)

And what better giant magnet than an artificial sun? Obviously for bodies too far from the sun for the sun to provide meaningful illumination. The reflector bounces more light back at the planet and also prevents light pollution affecting nearby bodies so the sky isn't full of artificial suns.