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Birthday · May 30, 2022

Red Crepuscular Rays from an Eclipse

May 30, 2022

There are stars whose light will never reach us, worlds we will never touch, mysteries we may never solve.

Red Crepuscular Rays from an Eclipse

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APOD published May 30, 2022. Credit: Fefo Bouvier. A publication-date match, not a photo taken on your date. Independent of NASA.

Behind the image

Red Crepuscular Rays from an Eclipse

Original APOD · May 30, 2022

What's happening behind that island? Things both expected and unexpected. Expected, perhaps, the pictured rays of light -- called crepuscular rays -- originate from the Sun. Unexpected, though, the Sun was being partially eclipsed by the Moon at the time -- late last month. Expected, perhaps, the Sun's rays are quite bright as they shine through gaps in below-horizon clouds. Unexpected, though, the crepuscular rays are quite red, likely the result an abundance of aerosols in Earth's atmosphere scattering away much of the blue light. Expected, with hope, a memorable scene featuring both the Moon and the Sun, superposed. Unfortunately, from this location -- in Uruguay looking toward Argentina -- clouds obscured the eclipse -- which wasn't completely unexpected. However, after packing up to go home, the beauty of bright red crepuscular rays emerged -- quite unexpectedly. Oh -- and that island on the horizon -- it's really two islands.

Image credit: Fefo Bouvier

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