The second full moon of May — a blue moon — will make an appearance this weekend.

What is it about the Blue Moon that inspires us to write songs and name beers after it?

A rare Blue Moon, the second full moon in May, will also be a "micromoon" near its farthest point from Earth.

California stargazers should look up Sunday evening: a rare blue moon will light up the sky, and it’s the last chance to see the phenomenon for more than two years. The second full moon of May is set ...

A celestial rarity known as a blue micromoon will grace the night sky this weekend. It arises from the coinciding of two lunar effects. When there are two full moons in a single c ...