On June 22 and 23, the Earth's only natural satellite put on a dazzling show. Although the 'supermoon' phenomenon isn't exactly an astronomical term, and it's not an event of any great scientific consequence, it captivated the world. The cosmic coincidence of the moon being at its full phase as it made its closest approach (perigee) in its elliptical orbit, caused the 2013 supermoon to be 14 percent larger in the sky (when compared to its furthest point in orbit, or apogee) and 30 percent brighter, according to NASA. It rapidly became a beautiful astronomical spectacle.
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