Skywatchers around the world watched the rise and set of December's full moon, known as the "Cold Moon." It was the last supermoon of the year and the grand finale to the three-month supermoon trifecta .
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Skywatchers around the world watched the rise and set of December's full moon, known as the "Cold Moon." It was the last supermoon of the year and the grand finale to the three-month supermoon trifecta .