WWW: Penumbra

Penumbra is the partial shadow (as in eclipse) created between regions of complete shadow and complete illumination. Happening tonight!

Image result for images of penumbral lunar eclipse

 

http://www.usatoday.com/story/tech/sciencefair/2017/02/07/penumbral-lunar-eclipse-snow-moon-comet/97593778/?utm_content=buffer989c0&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer

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