七月下旬，我们正步入新的月球周期，月亮逐渐变得更加清晰可见。7月29日，月相为“盈凸月”，地球上可见月球表面的23%。这是一个观察月球细节的好时机，肉眼可见“丰饶海”和“危海”，使用望远镜还能看到恩底弥翁陨石坑。文章还解释了月相的形成原因，即月球绕地球公转周期性地改变了太阳、月球和地球之间的角度，从而影响了我们从地球看到的月球被太阳照亮的部分。文章最后预告了下一次满月将在8月9日出现，并列举了八个主要的月相循环。

✨ 本月29日为“盈凸月”，月球表面有23%的可见光，是观察月球细节的绝佳时机。你可以通过肉眼欣赏到“危海”和“丰饶海”，若使用望远镜，更能清晰地看到恩底弥翁陨石坑，展现了月球表面的丰富地貌。

🌕 文章详细阐述了月相的形成机制，指出月相变化源于月球29.5天的公转周期，导致太阳、月球和地球之间的角度不断变化。这意味着我们看到的月球亮度和形状，取决于它在轨道上所处的位置，从而形成了从新月到满月再到残月的周期性循环。

🔭 文章明确了下一次满月将在8月9日出现，并回顾了上一次满月发生在7月10日。此外，还列举并解释了八个主要的月相，包括新月、盈凸月、上弦月、盈凸月、满月、亏凸月、下弦月和残月，为读者提供了一个完整的月相认知框架。

We're well and truly into the new lunar cycle, and the moon is starting to appear more visible to us on Earth. So, what's happening tonight, July 29?

What is today’s moon phase?

As of Tuesday, July 29, the moon phase is Waxing Crescent. There's 23% of the moon's surface visible to us on Earth (according to NASA's Daily Moon Observation).

It's the fifth day of the lunar cycle, and there is plenty to see tonight. With the unaided eye, enjoy a glimpse of the Mare Crisium and the Mare Fecunditatis, an impact basin also known as the "Sea of Fertility."

Add binoculars or a telescope, and you'll see the Endymion Crater too.

When is the next full moon?

The next full moon will be on August 9. The last full moon was on July 10.

What are moon phases?

According to NASA, moon phases are caused by the 29.5-day cycle of the moon’s orbit, which changes the angles between the Sun, Moon, and Earth. Moon phases are how the moon looks from Earth as it goes around us. We always see the same side of the moon, but how much of it is lit up by the Sun changes depending on where it is in its orbit. This is how we get full moons, half moons, and moons that appear completely invisible. There are eight main moon phases, and they follow a repeating cycle:

New Moon - The moon is between Earth and the sun, so the side we see is dark (in other words, it's invisible to the eye).

Waxing Crescent - A small sliver of light appears on the right side (Northern Hemisphere).

First Quarter - Half of the moon is lit on the right side. It looks like a half-moon.

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.

Last Quarter (or Third 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.