According to NASA, a waning moon, also known as waning gibbous, is one of eight moon phases. It is when a full moon is beginning to get smaller.
Creator: Warren de la Rue
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Waning Moon (1880)
Attributed to: Warren de la RueCentury: 19th CenturyDecade: 1880sMedia Type: PhotoSource: RijksmuseumLicense: Public Domain