Night Sky Tonight, December 4, 2025: Cold Supermoon, Geminids Begin and Northern Lights Possible
The final full supermoon of 2025, known as the Cold Supermoon, rises tonight, reaching full phase at 23:14 UTC. The Geminid meteor shower officially begins, and a geomagnetic storm may bring northern lights to lower latitudes. Jupiter and Saturn appear bright, while NASA continues tracking interstellar comet 3I/ATLAS in the background.