How to see ghostly 'Da Vinci glow' illuminate the crescent moon this week

A phenomenon called ‘Da Vinci glow’ will be visible on the dark limbs of the moon on successive days this week and again next weekend. 

The subtle light — also known as “Earthshine” — is sunlight reflected first by Earth onto the lunar surface, then again into the eyes of the viewer. The effect is a faint, ghostly glow on the shadowed part of the moon’s Earth-facing side.

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