"An older definition of Blue Moon is that it's the third of four full moons in a single season." (Source: Earthsky.org)

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People around the world posted photos of Friday's full moon on social media.

(Scroll down to see photos posted to social media. Watch video about the blue moon from NASA here.)

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Peachtree Center in downtown Atlanta is seen returning to business Wednesday morning, June 12, 2024 after a shooting on Tuesday afternoon left the suspect and three other people injured. (John Spink/AJC)

Credit: John Spink