A rare Halloween blue moon has been thrilling skywatchers across the globe. The last time a blue moon occurred on Halloween was in 2001, according to the Farmer's Almanac, and will not happen again until 2039. As the second full moon of the month, it is classified as a blue moon. “An older definition of Blue moon is that it’s the third of four full moons in a single season.”BLUE MOON TO APPEAR ON HALLOWEEN FOR THE FIRST TIME IN NEARLY 20 YEARSThe month’s other full moon, the “harvest moon,” occurred Oct. 1. Skygazers, however, should not expect the Halloween blue moon to be, well … blue.

Source: Fox News November 01, 2020 02:53 UTC