Occurs when the illuminated phase of a planet or moon is decreasing in size. For example, a waning gibbous Moon occurs between Full Moon and Last Quarter and a waning crescent Moon between Last Quarter and New Moon.

The phases of the Moon

Glossary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Sky Highlights - April 2017

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Current Moon Phase



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