Moon phases

The sunlit part of the Moon visible from Earth (blue circle, center) varies as the Moon orbits Earth. These sunlit parts are called the phases of the Moon; they are shown here as they appear to an observer in the Southern Hemisphere on Earth.

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Photo credit: © Encyclopaedia Britannica Inc. / Alamy / Afripics
License: Licensed
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Keywords: crescent, diagrams, earth, full, gibbous, lunar, moon, orbit, phases, quarter, sunlight, waning, waxing