December's Cold Supermoon Illuminates Night Skies
The final supermoon of 2025, known as the Cold Moon, reached its peak on December 4, offering a luminous display as it appeared larger and brighter due to its proximity to Earth.
On December 4, 2025, the final supermoon of the year, termed the Cold Moon, reached its fullest phase at 8:20 a.m. EST. This event marked the third consecutive supermoon, following those in October and November. A supermoon occurs when the full moon coincides with its closest approach to Earth, known as perigee, making it appear up to 14% larger and 30% brighter than when it's farthest away.
December's full moon is traditionally called the Cold Moon, reflecting the frigid season. It is also referred to as the Long Night Moon due to its occurrence near the winter solstice, resulting in extended nighttime illumination.
Observers noted that this Cold Supermoon appeared higher in the night sky than any other full moon of the year. This elevation is due to the sun's low position near the winter solstice, causing the full moon to mirror this by rising higher.
The next full moon, known as the Wolf Moon, is scheduled for January 3, 2026. This will be the fourth consecutive supermoon, continuing the series of larger and brighter full moons.