Moon Phase Today: September 16 2026 – What You’ll See in the Night Sky

If you glance upward this evening, you’ll notice a delicate sliver of light hanging in the eastern sky. That’s the Moon, currently hanging in its waxing‑crescent phase and showing roughly 26 % of its illuminated side.

It’s a subtle, almost shy glow, but it’s enough for us to start making out some of the Moon’s more famous “seas.” With the naked eye you should be able to pick out Mare Crisium – the “Sea of Crises” – and Mare Fecunditatis, the “Sea of Fertility,” perched on the lunar near‑side. If you’ve got a pair of binoculars, or better yet a modest telescope, look a little farther right and you’ll spy the faint outline of Endymion Crater, a small bowl‑shaped pit that’s been a favorite target for backyard astronomers.

Mark your calendars: the next full moon won’t arrive until September 26. That gives you a little over a week to watch the crescent grow bigger, brighter, and eventually blossom into a full disk.

Why does the Moon change shape at all? It’s all about geometry. As the Moon orbits Earth – a journey that takes about 29.5 days – we see varying portions of its sun‑lit half. When the Sun, Earth, and Moon line up in different ways, the illuminated slice we can see expands or shrinks, creating the familiar lunar phases.

Here’s the classic eight‑step cycle, just in case you need a quick refresher:

• New Moon – The Moon sits between Earth and the Sun, so the side facing us is dark.
• Waxing Crescent – A thin sliver appears on the right side (for observers in the Northern Hemisphere).
• First Quarter – Half the Moon is lit on the right; it looks like a perfect half‑circle.
• Waxing Gibbous – More than half is illuminated, but it’s not yet full.
• Full Moon – The entire face is bathed in sunlight.
• Waning Gibbous – Light starts to retreat from the right side.
• Third (or Last) Quarter – Again we see a half‑Moon, this time the left side is lit.
• Waning Crescent – Only a thin sliver remains on the left before the cycle resets.

All of this is governed by the Moon’s position relative to both Earth and the Sun, a relationship that NASA tracks meticulously in its Daily Moon Guide. So, tonight, step outside, give your eyes a few minutes to adjust, and enjoy the quiet beauty of the waxing crescent as it quietly grows toward fullness.