DALLAS — On Monday night, North Texans will have the chance to witness something cool… and it only happens once in a blue moon (had to do it, sorry!). A full moon, both “super” and “blue ...

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.