Space

Grown-ups

The Moon in December 2026

The Moon is full on 23 December, and new on 8 December. Every night of December 2026 is drawn below, from astronomy-engine's numbers for the Moon at 10 pm Mountain Time; the shape is the same anywhere in the US that night.

December 2026

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The four phase dates

In December, look at the Moon every night. On 23 December 2026 it is a big round circle. Around 8 December 2026 you can't see it at all. Draw what you see.

The Moon is full on 23 December, and new on 8 December. First quarter, when the right half is lit, is on 16 December 2026: a good night to look at craters with binoculars, along the line between light and dark. The Moon goes from new to full and back in about 29 and a half days.

The Moon is full on 23 December, and new on 8 December. At that full Moon, astronomy-engine puts it about 356,729 km from Earth's center; the Moon's distance swings between about 356,000 and 406,000 km. Phase dates here are the Mountain Time day of the exact instant, so a phase late in the evening can fall on the next day in Europe.

‹ November 2026 · January 2027 ›

Every month

“Count the nights from one full Moon to the next. You'll get about twenty-nine and a half.”

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