What to Know About the Blue Supermoon

The celestial event, which is visible from Sunday to Wednesday morning, probably won’t happen again until 2037. A “blue” moon bears no connection to the color blue, and the moon won’t have a colorful tinge. Instead, a blue moon is used to describe what is effectively an additional full moon, one that violates the rule of thumb, that there is one full moon in a month, or three full moons in a season.