Lunar eclipses happen every six months. They are total, partial or penumbral. On Jan. 20, we will see the next total lunar eclipse! This is when the moon moves completely into Earth’s shadow and appears dark red. Partial eclipses are when part of the moon moves into Earth’s shadow and appear to have a piece missing. Penumbral eclipses are when the moon is in the area where some of the sun’s light is blocked and it appears less bright than most full moons.