earthshine

noun
earth·​shine | \ ˈərth-ˌshīn How to pronounce earthshine (audio) \

Definition of earthshine

: sunlight reflected by the earth that illuminates the dark part of the moon Because the moon will be near half phase, earthshine will brighten the dark portion of the moon.Astronomy

called also earthlight

Examples of earthshine in a Sentence

Recent Examples on the Web

This effect is caused by earthshine — the light of the sun shines on the Earth and reflects upon the moon. Dean Regas, USA TODAY, "Lunar secrets: Why doesn’t the moon have a better name?," 23 Oct. 2017

First Known Use of earthshine

1834, in the meaning defined above

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