DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Crescent Moon and Earthshine. View of a crescent moon in the sky. The bright sliver (the crescent) is directly lit by the Sun. However, the dimly lit side is illuminated only by sunlight reflecting off the Earth's surface, known as Earthshine.
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