Comment on This post contains a minor exploration spoiler, but no story spoilers
peopleproblems@lemmy.world 10 months agoThere is one other thing I can think of, but I imagine it would have to have been a weapon of some sort. The molten core would have to cool enough to stop the dynamo.
ArchmageAzor@lemmy.world 10 months ago
A weapon capable of that would be beyond anything ever devised, and even if the magnetosphere disappeared it would take many millennia for the atmosphere to be stripped away. Mars lost its magnetosphere 4 billion years ago and still has an atmosphere today