![]() It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases. This refers to how many days it has been since the last New Moon. The illumination is constantly changing and can vary up to 10% a day. The illumination is constantly changing and can vary up to 10 a day. This is the percentage of the Moon illuminated by the Sun. The Waning Crescent on September 10 has an illumination of 18. This is the percentage of the Moon illuminated by the Sun. Visit the September 2023 Moon Phases Calendar to see all the daily moon phase for this month. The Waning Crescent on April 10 has an illumination of 36%. Visit the April 1999 Moon Phases Calendar to see all the daily moon phase for this month. Along the edge where the illuminated portion meets the dark side, the craters and mountains cast long shadows making them easier to observe with a telescope or binoculars. It can also be a great time to see the features of the Moon's surface. During this part of the Moon cycle, the Moon is getting closer to the Sun as viewed from Earth and the night side of the Moon is facing the Earth with only a small edge of the Moon being illuminated. In this phase the Moon’s illumination is growing smaller each day until the New Moon. This phase is best viewed just before the sunrise in the western sky. On this day the Moon was in a Waning Crescent phase.
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