Is there a lower density limit for having a magnetosphere though? A habitable planet with 1.5x earth radius and the same mass would be much easier to get off of.
Comment on Lmao
CheeseNoodle@lemmy.world 7 hours agoThe problem is you can’t have mountains like that on tectonically active planets (a mountain that big on earth would sink into the mantle), which is kind of a prequisite for a long-term magnetosphere so its unfortunately not something a species could likely ever have except as a result of terraforming a world like mars and setting up some kind of artificial magnetosphere.
cogitase@lemmy.dbzer0.com 6 hours ago
CheeseNoodle@lemmy.world 6 hours ago
I guess that could work? Earth is actually the densest planet in the solar system so our baseline mass > size ratio might actually be a bit abnormal.
Grail@multiverse.soulism.net 5 hours ago
If that’s true, how did Olympus mons get there in the first place? I thought it was a volcano.
arrow74@lemmy.zip 2 hours ago
Mars was geologically active but its core cooled.