A cold supermoon is on its way. On December 4, Earth's satellite will delight us with one of the last astronomical spectacles of 2025. Not only will it be the last full moon of the year, but it's also a cold moon—which refers to the frigid temperatures typical of this time of year—and, finally, a supermoon . Here's how and when best to enjoy this spectacle of the year-end sky.

What Is a Supermoon?

The term supermoon refers to a full moon that occurs when our satellite is at perigee, the point at which its orbit brings it closest to our planet. (The moon's orbit is elliptical, and its distance from Earth varies between about 407,000 km at apogee, the point of maximum distance, and about 380,000 at perigee.)

In addition to being the third consecutive supermoon of the year, as reported

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