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What Are the Phases of the Moon?
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Lunar phases
Explore the phases of the Moon and their effectiveness in tracking time
Full moon Waning gibbous moon
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Galileo spacecraft image of the Moon taken on December 7, 1992. The distinct bright ray crater at the bottom of the image is the Tycho impact basin. The dark areas are lava rock filled impact basins: Oceanus Procellarum (on the left), Mare Imbrium (cont'd
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What Are the Phases of the Moon?: Media

Videos

Explore the phases of the Moon and their effectiveness in tracking time
Learn about the phases of the Moon and their effectiveness in tracking time.
Video: Encyclopædia Britannica, Inc.

Images

Lunar phases
Phases of the Moon as it orbits Earth, showing the angle formed by the position of...
Encyclopædia Britannica, Inc.
Full moon
Photograph of the full moon based on the global elevation map being developed from...
NASA Goddard
Waning gibbous moon
Photograph of the waning gibbous moon based on the global elevation map being developed...
Goddard Space Flight Center/NASA
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