The Moon is putting on a show this week, and the view gets better each night. On Wednesday, Sept. 16, the Moon enters the Waxing Crescent phase, with 26% of its surface visible. That means the illuminated portion is growing, and the darker side of the Moon is starting to catch the light of the Sun.
The change is visible to the naked eye, and binoculars or a telescope will reveal even more detail. For anyone who steps outside to look up, the next few nights offer a simple way to track the Moon’s progress through its monthly cycle.
Waxing Crescent Growth
In the Waxing Crescent phase, a small sliver of light appears on the right side of the Moon, as viewed from the Northern Hemisphere. The Moon moves between the New Moon and the First Quarter, and each evening brings a slightly fuller appearance.
The illuminated portion grows from nearly nothing to about a quarter of the Moon’s visible face. That growth is the defining feature of the Waxing Crescent phase, and it is what makes this week a good time to watch the Moon’s surface change from night to night.
The Moon’s illuminated side continues to grow this week, which means we are getting a better view of some of its surface features each night.
Features to Spot Tonight
Two large features stand out during the Waxing Crescent phase. Mare Crisium and Mare Fecunditatis are both visible with the naked eye, though they appear as dark spots on the Moon’s surface rather than bright craters.
For a closer look, binoculars or a telescope will reveal Endymion Crater.
“There’s a little more of the Moon to see this week as its illuminated side continues to grow.”
That captures the essence of what is happening in the sky. The Moon is adding light, and the features beneath that light are becoming easier to see.
The Lunar Cycle Explained
The Moon’s phases repeat every 29.5 days, a period known as the synodic month. During that time, the Moon completes one orbit around Earth while Earth moves around the Sun, changing the angle from which sunlight strikes the Moon’s surface.
The eight phases of the Moon, in order, are:
- New Moon – The Moon is between Earth and the Sun, so the side we see is dark.
- Waxing Crescent – A small sliver of light appears on the right side.
- First Quarter – Half of the Moon is lit on the right side.
- Waxing Gibbous – More than half is lit up, but it’s not quite full yet.
- Full Moon – The whole face of the Moon is illuminated and fully visible.
- Waning Gibbous – The Moon starts losing light on the right side.
- Third Quarter (or Last Quarter) – Another half-Moon, but now the left side is lit.
- Waning Crescent – A thin sliver of light remains on the left side before going dark again.
Each phase lasts a few days, and the transition from one to the next is gradual.
The Next Full Moon
The next Full Moon will take place on September 26. That means the Moon’s illuminated side will continue to grow until it fills the sky completely.
Between now and then, the Moon will pass through the Waxing Gibbous phase, reaching its maximum illumination just before the Full Moon arrives. The Full Moon occurs when the Moon is opposite the Sun in the sky, and its entire face is lit by direct sunlight.
| Date | Phase |
|---|---|
| Sept. 16 | Waxing Crescent (26%) |
| Sept. 26 | Full Moon |
The table above shows the key dates in the Moon’s current cycle. It is a simple way to keep track of where the Moon stands each night.
Why This Is Worth Watching
Watching the Moon’s phases is a simple way to connect with the natural world. The changes happen predictably, and they require no equipment beyond eyes and a clear sky.
The Moon’s appearance depends on its position relative to Earth and the Sun, and tracking those positions is a practical skill. Anyone who pays attention will notice the pattern: the Moon grows brighter, reaches its peak, then fades back to darkness before the cycle repeats.
The visible features add context. Mare Crisium and Mare Fecunditatis are real places on the Moon, and seeing them with the naked eye connects the abstract concept of a phase to something tangible in the sky.
Endymion Crater is a distinct feature, and spotting it through binoculars or a telescope rewards curiosity. The combination of the growing illuminated portion and the visible mare and crater makes this week a good time to step outside.
The Full Moon on Sept. 26 will be the highlight of the cycle, but the journey there is the interesting part. Each night offers a slightly different view, and the Moon’s appearance changes from hour to hour as the Sun’s angle shifts.
The Waxing Crescent phase is a gentle reminder that the Moon is not fixed. It moves, it changes, and it offers a nightly reminder of the scale of the solar system.
For anyone who wants to learn more, the sources are readily available. NASA’s tracker provides daily updates, and the lunar phases themselves are a free and accessible phenomenon. All you need is a clear sky and a willingness to look up.
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