Last Supermoon of 2025: December’s Cold Moon to Illuminate Skies
The final supermoon of 2025, known as the Cold Moon, will grace night skies in December, appearing significantly larger and brighter than average moons. This celestial spectacle marks the second brightest supermoon of the year following November’s Beaver Moon.
Key Details
- Peak Illumination: December 5, 2025
- Visibility: Appears 14% larger and 30% brighter than faintest moons
- Best Viewing: Just after moonrise when Moon illusion enhances size
- Orbital Distance: Approximately 363,000 km from Earth at perigee
What Makes a Supermoon?
A supermoon occurs when a full Moon reaches its closest orbital point to Earth (perigee), roughly 363,000 kilometers away. While not an official astronomical term, “supermoon” describes any full Moon coming within 90% of its perigee.
Viewing Conditions and Effects
The December supermoon rises before the peak of the Geminids meteor shower, ensuring exceptionally dark skies for observation. The Moon’s close approach will also cause higher-than-usual tides along coastal areas.
Traditional Names and Cultural Significance
The Cold Moon carries numerous traditional names including Long Nights Moon (coinciding with the winter solstice), Frost Exploding Trees Moon, Hoar Frost Moon, and Moon before Yule. Ancient Europeans celebrated Yuletide festivals near the winter solstice, marking the Sun’s return.
