Moon

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Jupiter_ Saturn_8376a.jpg
Jupiter and Saturn where aligned in the night sky on Dec. 20 in an event astronomers call the "great conjunction" — also referred to as the "Christmas Star" — marking the planets' closest encounter in nearly 400 years. Photograph taken in Mill Valley, CA.
Jupiter and Saturn where aligned in the night sky on Dec. 20 in an event astronomers call the "great conjunction" — also referred to as the "Christmas Star" — marking the planets' closest encounter in nearly 400 years. Photograph taken in Mill Valley, CA.