Dec. full moon is here! About Cold Moon, last 2025 supermoon
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The December full moon, commonly known as the Cold Moon or Long Night Moon, marks the final full moon of the year. Occurring close to the winter solstice, this moon is significant as it shines brightly during the longest nights of the year.
New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon, came from closer to the sun.