The last full moon of the year is a real show-off. On December 4, the “Cold Supermoon” will rise in Taurus, shine brighter than usual, and climb higher than any other full moon of 2025. It’s the second-biggest full moon of the year and the third in a four-supermoon streak, which feels on-brand for a memorable year, to say the least.

Astronomers say the moon is officially full at 6:14 p.m. EST, but the time that actually matters is moonrise where you live. That’s when it drags itself over the horizon at dusk and looks oversized behind houses and buildings. The “super” label kicks in when a full moon lines up with perigee, the point in its orbit closest to Earth. That geometry makes it appear roughly 10 percent larger and brighter than an average full moon, especially when your brain compar

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