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Feel the Magic: Decembers Cold Supermoon offers your last 2025 sky spectacle but will bright moonlight block the Geminids?

The final supermoon of 2025 lights up US skies soon. Known as the Cold Moon, it hits full phase on December 4. This event caps a trio of supermoons this year. At peak, the moon sits just 221,965 miles from Earth. That's 17,000 miles closer than average distance. Expect a stunning sight. The moon appears 14% larger in diameter. It shines 30% brighter than a standard full moon. North America's winter chill inspires the Cold Moon name. Clear nights boost visibility across the nation.