Astronomy Picture of the Day . Not a Blue Moon . ... Credit: Stefano De Rosa Explanation: This bright Full Moon was captured on December 2nd, shining above a church overlooking the River Po, in Turin, Italy, It was the first Full Moon in December. Shining on celebrations of New Year's Eve, last night's Full Moon was the second Full Moon of December and so fits the modern definition of a Blue Moon - the second Full Moon in a month. ... Publications with keywords: full moon - blue moon . ...