Get ready to be amazed! The final supermoon of 2025, the 'Cold Moon,' put on a spectacular show, lighting up the sky on December 4th. This wasn't just any full moon; it was a supermoon, meaning it appeared larger and brighter than usual. But what made this event truly special? Let's dive in!
This celestial event, also known as the Cold Moon, reached its peak brilliance shortly after sunset. But here's where it gets controversial: it coincided with significant dates in space exploration history and overlapped with not one, but two active meteor showers. This created a rare, multi-layered opportunity for skywatching.
This final supermoon completed a trio of close lunar approaches, making it one of the brightest full moons visible in the Northern Hemisphere. The timing also marked the anniversaries of the Apollo 8 and Apollo 17 missions, two pivotal moments in NASA's history that forever changed our relationship with the Moon.
Adding to the excitement, the Cold Moon arrived as anticipation builds for the Artemis II mission, scheduled to launch between February and April 2026. This mission will send astronauts around the Moon for the first time in over 50 years. For anyone who enjoys watching the sky, the Cold Moon was more than just a visual treat; it was a moment filled with historical and scientific significance.
A Bright and High-Riding Moon
The Cold Moon reached its peak at 5:14 p.m. CST (23:14 UTC) on December 4th, about two hours after moonrise in central North America. Because the Moon was at its perigee—its closest point to Earth—less than 12 hours earlier, it qualified as a supermoon. This made it appear up to 14% larger and 30% brighter than a typical micromoon.
In the Northern Hemisphere, the December full moon mirrors the path of the June solstice sun, rising high and staying visible for extended periods. This elevated path, coupled with the clear winter air and sparse foliage, enhances brightness and shadow detail—perfect conditions for observing and photographing the moon. In the Southern Hemisphere, where summer is beginning, the moon remains low, similar to a winter sun.
The name 'Cold Moon' comes from its timing near the winter solstice. It has also been known by various names in Indigenous traditions, such as the Snow Moon (Cherokee) and Winter Maker Moon (Abenaki). These names highlight how lunar cycles have been used to mark seasonal changes and guide agricultural practices.
Apollo 8, Apollo 17, and the Artemis Return
December's supermoon arrived with a sense of historical significance. It fell just days before two major NASA anniversaries:
- Apollo 17, launched on December 7, 1972, marked the last time humans landed on the Moon.
- Apollo 8, launched on December 21, 1968, was the first crewed mission to orbit the Moon and captured the iconic Earthrise image.
NASA is now preparing for Artemis II, the agency’s first crewed mission beyond low Earth orbit since Apollo. Expected in early 2026, the 10-day flight will send four astronauts around the Moon, serving as a precursor to Artemis III, which aims for a crewed landing near the lunar south pole.
The proximity of the Cold Moon to these historic dates has reignited public interest in the Moon as both a scientific target and a cultural symbol. It also marks the last full moon of 2025 and the final one of autumn in the Northern Hemisphere, a moment of reflection and anticipation for future lunar exploration.
Meteor Showers Under Dark Skies
To make things even more exciting, two of the year’s most active meteor showers—the Geminids and Ursids—were peaking within weeks of the Cold Moon.
The Geminid meteor shower reached its peak on December 13–14, with a favorable 30% waning moon, allowing for darker skies. Known for its high activity, often exceeding 100 meteors per hour, the Geminids are considered one of the most reliable annual showers.
The Ursid meteor shower, which peaks on December 21–22, benefited from even darker conditions, with the moon down to just 3% illumination. Although less intense than the Geminids, the Ursids still offered a solid display for observers, particularly in rural or high-latitude locations.
These showers, combined with the supermoon's clarity and brightness, made December an exceptional month for amateur astronomers, astrophotographers, and casual stargazers.
What do you think? Did you get a chance to see the Cold Moon or any of the meteor showers? Share your experiences and thoughts in the comments below! Did you know about the historical significance of the dates? What are you most excited about regarding the Artemis missions? Let's discuss!
