Around dusk this evening, a magnificent celestial event will occur, and it happens only once in a blue moon. And I will be at Gloucester Harbor, north of Boston, to marvel at its spectacle.
Today, there will be a supermoon, but making it even more remarkable is that it is the second full moon of August, creating the designation of blue moon and the only one in 2023. The next blue moon will be in 2037. Two full moons in one month only happen "once in a blue moon." It is also a supermoon, which, according to the following description from NASA:
