Winter has arrived: Science behind the winter solstice, the

Thursday, Dec. 21 at 9:27 p.m. marks the official start of winter.

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, Northern Hemisphere , Barlow Planetarium , Ty Westbrook , Winter Solstice , Parts Ofa Day , Sunset , Solstice , June Solstice , Planetarium , Solstices , Winter , Astronomy , Summer Solstice , Solar Phenomena , Time In Astronomy ,