Comparison of the Full Moon at apogee (farthest from Earth for the year) at left, and at perigee (closest to Earth) at right. The perigean Moon is called a 'Supermoon'. This apogee Moon was shot on Halloween, October 31, 2020 and was the smallest, most distant Full Moon of 2020. It was also a 'Blue Moon,' meaning it was the second Full Moon of the calendar month. The perigee Moon was the 'Pink' Moon of 2021. In this pair the perigee Moon is about 15 per cent larger than the apogee Moon. This shows an example of the lunar disk size at its extremes. Most Full Moons appear midway in size between these two examples. The two Moons also show the effect of libration where, in this case, more of the southern limb is tipped toward us on the perigee Moon, and more of the northern limb toward us on the apogee Moon. Being Full Moons, the bright rays emanating from large craters such as Tycho (bottom) and Copernicus (left), are prominent on each disk.