December 18 Waxing Gibbous 94% |
December 19 Waxing Gibbous 98% |
December 20 Full Moon Illumination: 100% |
December 21 Waning Gibbous 100% |
December 22 Waning Gibbous 98% |
On this day the Moon will be in a Full Moon phase. The Moon will be visible throughout the night sky rising at sunset in the east and setting with the sunrise the next morning in the west. During a Full Moon the moon is 100% illuminated as seen from Earth and is on the opposite side of the Earth from the Sun. The point at which a Full Moon occurs can be measured down to a fraction of a second. The time it takes between full moons is known as a Synodic month and is 29.530587981 days long. Keep track of all the Full Moons throughout the year on the Full Moon Calendar >
Visit the December 2029 Moon Phases Calendar to see all the daily moon phase for this month.
The Full Moon on December 20 has an illumination of 100%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On December 20 the Moon is 14.34 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.
There are 8 lunar phases the Moon goes through in its 29.53 days lunar cycle. The 4 major Moon phases are Full Moon, New Moon, First Quarter and Last Quarter. Between these major phases, there are 4 minor ones: the Waxing Crescent, Waxing Gibbous, Waning Gibbous and Waning Crescent. For more info on the Moon Cycle and on each phase check out Wikipedia Lunar Phase page.
Check the weather before a night of Moon gazing at weather.com
For a list of all the current meteor showers visit American Meteor Society