A cold supermoon will appear on December 4, marking the final full moon and supermoon of 2025. This event, known as the cold moon due to typical winter chill, offers a striking year-end sky spectacle. Viewers can best enjoy it shortly after sunset.
Earth's moon will reach its full phase on December 4, 2025, coinciding with a supermoon—the last of the year. This phenomenon, termed the "cold moon," reflects the frigid temperatures often associated with December. It stands as one of the final astronomical highlights for 2025, drawing attention to the night sky amid seasonal transitions.
The supermoon occurs when the moon is at its closest point to Earth, appearing larger and brighter than usual. As the year's concluding full moon, it provides a fitting celestial capstone. Astronomy enthusiasts note its significance in the annual lunar cycle, blending natural beauty with winter's onset.
Optimal viewing begins just after sunset on December 4, when the moon rises against the darkening sky. No special equipment is required, though clear weather enhances the experience. This event underscores the moon's enduring role in human observation of the cosmos.