Tonight, skywatchers will be treated to a rare and exciting astronomical event: a black moon, which is the second new moon to occur in December. While blue moons, or two full moons in a month, are relatively well-known, black moons are much rarer and are often misunderstood. A black moon occurs when the second new moon of the month takes place, and the new moon’s natural invisibility is further enhanced. As a result, this phenomenon makes it difficult to spot with the naked eye, but it