Blue moon

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.
Photo by: Mauricio Hernandez / Caption by:

Sound-reactive LED necklace

A maker built an eye-catching necklace that flashes to the beat of any music it hears.
Photo by: Hannah Perner-Wilson / Caption by:

A star is born

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.
Photo by: ESO/ALMA (ESO/NAOJ/NRAO)/H. Arce. Acknowledgements: Bo Reipurth / Caption by:

Plant-powered breathing

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.
Photo by: Chiu Chih / Caption by:

Waving to Saturn

NASA released a collage of people around the world waving to the Cassini spacecraft as it took pictures of Earth through Saturn's rings.
Photo by: NASA/JPL-CalTech / Caption by:

11-story-tall Lego tower

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.
Photo by: Red Clay Consolidated School District/Facebook / Caption by:
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