本文介绍了月球的周期性变化，即月相。月相是由于月球绕地球公转过程中，太阳光照射到月球不同部分的反射角度变化所致。整个月球周期约为29.5天，包含新月、娥眉月、上弦月、盈凸月、满月、亏凸月、下弦月和残月八个阶段。文章指出，在7月24日，我们正处于新月阶段，月球不可见，可见度为0%。同时，文章也预告了下一个满月将在8月9日出现，并解释了月相变化是天体运行规律的自然体现。

🌕 月相变化源于29.5天的月球公转周期，这是太阳、月球和地球之间角度变化导致的结果。我们看到的月球亮度取决于其在轨道上被太阳照亮的部分，从而形成不同的月相，如满月、半月及不可见的新月。

🌟 当前（7月24日）处于新月阶段，月球位于地球和太阳之间，我们面向地球的一侧未被照亮，因此月球不可见，可见度为0%。这是月球周期中的第29天，进入下一个新周期的开始。

📅 文章预告了下一个满月将在8月9日出现，而上一个满月则发生在7月10日。这表明了月相的规律性，为天文观测者提供了重要的时间参考。

🌑 月球周期包含八个主要阶段：新月（不可见）、娥眉月（一小部分可见）、上弦月（右半边可见）、盈凸月（大部分可见）、满月（完全可见）、亏凸月（右侧开始变暗）、下弦月（左半边可见）和残月（左侧一小部分可见），循环往复。

The moon is hidden from sight tonight as we enter a new phase of the lunar cycle.

The lunar cycle is a series of eight unique phases of the moon's visibility. The whole cycle takes about 29.5 days, according to NASA, and these different phases happen as the Sun lights up different parts of the moon whilst it orbits Earth. 

So, what's happening tonight, July 24, and where are we in the lunar cycle? Keep reading to find out.

What is today’s moon phase?

As of Thursday, July 24, the moon phase is New Moon. This means the moon is not visible at all to us tonight, 0% to be exact (according to NASA's Daily Moon Observation).

It's day 29 of the lunar cycle, and with 0% visibility, there are no mares or craters on the moon's surface within sight.

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.