A blue supermoon typically occurs about once every 10 years. This rare event happens when a full moon is both a "supermoon" (the moon is closest to Earth, appearing larger and brighter) and a "blue moon" (either the second full moon in a calendar month or the third full moon in a season with four full moons). The most recent blue supermoon was in August 2023, and the next ones are predicted in January and March 2037, making this phenomenon quite uncommon but not exceedingly rare like once in centuries.
