Here's why tonight's blue supermoon is so special
Monday marks a rare cosmic event: a blue supermoon. It’s a combination of a supermoon, when it’s closest to Earth, and a blue moon, which is the third of four full moons in a season.
Monday marks a rare cosmic event: a blue supermoon. It’s a combination of a supermoon, when it’s closest to Earth, and a blue moon, which is the third of four full moons in a season.