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Blue moon

Sound-reactive LED necklace

A star is born

Plant-powered breathing

Waving to Saturn

11-story-tall Lego tower

When a giant, full blue moon rises, it's bound to capture the imaginations of sky watchers the world over. What does it really mean, though?

According to the now-defunct Maine Farmers' Almanac, each season has three full moons, but when a fourth appears, it's considered a blue moon. Due to an error in the March 1946 issue of Sky & Telescope magazine, however, people commonly interpret a blue moon to mean the arrival of a full moon in a month that already had one. Regardless of rival definitions, a blue moon only occurs once every two to three years and is a spectacular sight to witness. We've collected some mesmerizing images of the August 2013 blue moon snapped by moonstruck photographers around the globe.

Mauricio Hernandez, located in the super-dry Atacama Desert in South America, grabbed this sensationally sharp image of the blue moon.
Caption by / Photo by Mauricio Hernandez
A maker built an eye-catching necklace that flashes to the beat of any music it hears.
Caption by / Photo by Hannah Perner-Wilson
Everyone welcomed another newborn to our galaxy. For now, we only know her as the Herbig-Haro object HH 46/47, and she's already a beauty.
Caption by / Photo by ESO/ALMA (ESO/NAOJ/NRAO)/H. Arce. Acknowledgements: Bo Reipurth
Designer Chiu Chih created an artistic version of an air tank using a plant as a filter and oxygen generator. It's ready for a post-apocalyptic world.
Caption by / Photo by Chiu Chih
NASA released a collage of people around the world waving to the Cassini spacecraft as it took pictures of Earth through Saturn's rings.
Caption by / Photo by NASA/JPL-CalTech
Students and teachers celebrated at Dickinson High School in Milltown, Del., as their 11-story-tall Lego tower, which qualifies as the tallest in the world, topped its way into the Guinness World Record books.
Caption by / Photo by Red Clay Consolidated School District/Facebook
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