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And arguably sunspots, on rare occasions. But even if they count, it takes ideal conditions and you might hurt your eyes.

"The Moon and the Great Wall", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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And arguably sunspots, on rare occasions. But even if they count, it takes ideal conditions and you might hurt your eyes.


Page last modified: 11/27/2017.