今晚是新月，标志着新的月球周期开始，但可见部分极少。月球周期是一个约29.5天的循环，包含八个不同的可见阶段。这些阶段的形成是由于月球围绕地球运行时，太阳光照亮其不同部分的角度变化。文章详细介绍了月相的成因，以及新月、娥眉月、上弦月、盈凸月、满月、亏凸月、下弦月、残月的具体特征和在天空中呈现的样子。下一次满月将在8月9日出现。

🌙 月相的形成是由于月球绕地球公转，导致太阳、月球和地球之间的角度不断变化，从而影响我们从地球上看到的月球被太阳照亮的部分。整个月球周期约为29.5天，包含八个主要阶段。

✨ 今晚（7月25日）的月相是“娥眉月”，只有1%的月球表面可见，由于可见部分极少，即使使用双筒望远镜或望远镜也无法清晰观测到月球表面的细节。

🌕 月球的八个主要阶段按顺序为：新月（不可见）、娥眉月（一小 sliver 光）、上弦月（右半边亮）、盈凸月（大于半边亮）、满月（整个面被照亮）、亏凸月（右边开始变暗）、下弦月（左半边亮）、残月（左边 sliver 光），之后又回到新月。

🗓️ 文章提到，下一次满月将在8月9日出现，而上一次满月是在7月10日。这为读者提供了具体的天文观测时间参考。

The moon is in a new phase tonight, but there's hardly any of it on display as we start the beginning of a new 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. 

See what's happening tonight, July 25.

What is today’s moon phase?

As of Friday, July 25, the moon phase is Waxing Crescent. There's still not much to see tonight, with only 1% of the surface visible to us on Earth (according to NASA's Daily Moon Observation).

It's the first day of the lunar cycle, and with such limited visibility, there's nothing for you to spot on the moon's surface tonight, not even with binoculars or a telescope.

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.