Waning Gibbous Moon Phase Observed on September 29, 2026

As of September 29, 2026, the Moon is in the Waning Gibbous phase, with 92% of its surface illuminated. This phase follows the recent Harvest Moon, which was the full moon for this month. The lunar cycle, which lasts approximately 29.5 days, sees the Moon gradually losing light until it reaches the New Moon.

During this Waning Gibbous phase, observers can expect to see several prominent lunar features without any visual aids. Notable areas such as Mare Imbrium, Mare Serenitatis, and the Tycho Crater are clearly visible. For those equipped with binoculars, additional features like the Clavius Crater, the Alphonsus Crater, and the Alps Mountains can be observed. Telescopes will reveal even more details, including the landing sites of Apollo 11 and Apollo 17, as well as the Fra Mauro Highlands.

The Moon's phases are a result of its orbit around Earth, which takes about 29.5 days. As it moves through its cycle, different portions of its sunlit side become visible from Earth, leading to the various phases from New Moon to Full Moon and back again. NASA explains that the visibility of the Moon's phases is determined by its position relative to Earth and the Sun.

The eight distinct phases of the Moon include New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, and Waning Crescent. Each phase represents a specific point in the lunar cycle, influencing how much of the Moon is illuminated.

Looking ahead, the next Full Moon is anticipated to occur on October 25 or 26, depending on the observer's time zone. This upcoming event will mark another significant point in the lunar calendar, as the cycle continues to unfold, providing opportunities for enthusiasts and casual observers alike to engage with the night sky.