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I’m pretty sure I have seen a cosmic ray flash a couple of times over the past 20 years, lying in bed with eyes closed. It’s a sudden, bright flash caused by a

I’m pretty sure I have seen a cosmic ray flash a couple of times over the past 20 years, lying in bed with eyes closed. It’s a sudden, bright flash caused by a cosmic ray hitting the optic nerve. I read that Astronauts get them frequently, causing sleep difficulties.

jchanimal 7y ago
Citation https://en.wikipedia.org/wiki/Cosmic_ray_visual_phenomena https://en.wikipedia.org/wiki/Cosmic_ray_visual_phenomena