Moon phase today explained: What the moon will look like on December 20, 2025

Tonight, the moon is still very thin, marking the beginning of the waxing crescent phase in the U.S. However, in some parts of the world (depending on the time zone) the new moon is officially happening tonight.

What is today’s moon phase?

As of Saturday, December 20, the Moon’s phase is Waxing Crescent (if you’re in the US). There is very little to see tonight, with NASA’s daily moon observations showing that 0% of the moon will be illuminated. So, certainly, there is little or no chance of seeing any features on the Moon’s surface tonight.

When is the next full moon?

The next full moon will be on January 3. The last full moon was on 4 December.

What are the moon phases?

According to NASA, the Moon takes approximately 29.5 days to complete one complete cycle. This is known as the lunar cycle. During this entire time, it passes through several phases as it revolves around the Earth. Although the same side of the Moon always faces us, the amount of sunlight reflected off its surface changes, which is why it can appear fully illuminated, partially illuminated, or completely invisible at different points of the cycle. This process is divided into eight main lunar phases:

New Moon – The Moon is between the Earth and the Sun, so the side we see is dark (in other words, it is invisible to the eye).

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Waxing Crescent – ​​A small patch of light visible to the right (Northern Hemisphere).

First Quarter – The right half of the Moon is illuminated. It looks like a half moon.

Waxing Gibbous – More than half burnt, but not full yet.

Full Moon – The entire face of the Moon is illuminated and completely visible.

Waning Gibbous – The Moon begins to lose light from the right. (Northern hemisphere)

Third quarter (or last quarter) – Another half moon, but now the left side is illuminated.

Waning Crescent – ​​A thin sliver of light remains on the left before it gets dark again.



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