MONDAY, APRIL 22, 1974 On this day the Moon was in a New Moon phase. During this phase the Moon is to close to the sun in the sky to be visible. The moon rises and sets with the sun and is not present in the night sky. Because of this the night sky is darker and an excellent time to view other celestial objects. Like the Full Moon, a New Moon happens at a very specific time when the sun and moon have the same ecliptic longitude and it can be measured down to the second it occurs.
SATURDAY, NOVEMBER 22, 1980 On this day the Moon was in a Full Moon phase. 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 Moon will be visible throughout the night sky rising at sunset in the east and setting with the sunrise the next morning. 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.