Blue moon is either the second full moon in a calendar month or the third in an astronomical season with four full moons. The ...

Just exactly when is the next Supermoon Blue Moon? As we ready ourselves for the Supermoon Blue Moon on Monday, Aug. 19 where it officially becomes 100% full at 2:26 p.m. EDT (1826 GMT). Some of you ...

August's full moon was the first of four supermoons this year. We've rounded up some of the best photos worldwide. When you purchase through links on our site, we may earn an affiliate commission.