All of the moon phases will repeat in a 29.5-day cycle, which creates what is called the "lunar cycle," which occurs each ...

Today, Dec. 14, 2025, the moon is 24 days old and is in the Waning Crescent phase of its lunar cycle. It is 23% illuminated.

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under ...

The Moon's phases are caused by changing amounts of sunlight reflecting off its surface as it orbits Earth. Lunar eclipses happen during a Full Moon when Earth is between the Sun and Moon. Solar ...

A look at the phases of the moon, from new moon to full moon, including's tonight's lunar phase. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

The moon’s appearance changes drastically over the course of each month, from a crescent to a half-disk and then a full disk — and then back again. What causes these so-called phases of the moon? “The ...