A black moon also refers to the new moon phase itself when the moon is positioned between Earth and the sun, making it nearly invisible from our view. The black moon is a new moon in Capricorn, an Earth sign associated with ambition, professional goals, societal structures and authority, according to Thomas.

Every few years, two new moons occur in the same month - and that is what's known as a black moon. However, as with all new moons, it won't be visible from Earth. Find out more here.

December 2024 will feature a rare Black Moon on December 30 at 5:27 p.m. ET. This second new moon of the month won't be visible, but its lack of moonlight will create ideal conditions for stargazing and viewing distant celestial objects.