Hello, stargazers. The premier sky event this month is a partial lunar eclipse, visible across the USA, that occurs in the early morning hours of Nov. 19 (the night of Nov. 18-19). Most of the time we don’t think much about the shadow of the earth.

It’s always there, pointed directly away from the sun and invisible, but every now and then, when the sun, earth, and moon line up exactly, that shadow falls across the face of the moon, throwing an otherwise bright full moon into darkness for a few hours.

Ian Clarke is the director of the Hatter Planetarium at Gettysburg College. More information available at www.gettysburg.edu/hatterplanetarium.

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