Here's a fun video from NASA that starts with a fascinating visualization of how Earth's magnetosphere protects us from frequent coronal mass ejections (CMEs) from the sun, and then moves on to the "Dynamic Earth" ocean visualization I posted a couple months ago (that video embed link works now). Venus, which has no magnetosphere, gets fairly thoroughly pummeled before the simulated CME reached Earth. That'll be an important problem to overcome when humans eventually decide to make Venus habitable.
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