Moon lovers have reason to celebrate this week.

Tuesday’s full moon coincides with a partial lunar eclipse, allowing people in North America, South America, Africa and Europe to see part of the lunar surface obscured by Earth’s shadow.

A partial lunar eclipse occurs when the Earth passes between the moon and the sun, creating a line of the sky that blocks sunlight from reaching the moon’s surface.

Tuesday will focus on the full moon of September. According to NASA, this moon is also called the Harvest Moon, because it is often associated with harvest time in the Northern Hemisphere.

It will also be a supermoon, because the moon will be at its closest point to Earth in its elliptical, 27-day orbit. When a full moon happens to occur at the same time as its closest approach to Earth, it will appear slightly larger and brighter than the average full moon, which is why it is called a “supermoon.”

The partial lunar eclipse begins Tuesday night at 8:41 p.m. ET, when the moon enters part of Earth’s shadow. Even with good weather and clear conditions, the darkening effect will likely be difficult to see until the top of the moon is obscured around 10:13 p.m. ET, NASA said.

The eclipse will peak at 10:44 p.m. ET, when about 8% of the moon’s surface will be in complete shadow. This will be about 10 minutes after full moon at 10:35 p.m. ET.

After the peak of the eclipse, the moon will leave Earth’s shadow. This will happen on Wednesday morning around 12:47 a.m. ET.

Unlike solar eclipses, a lunar eclipse does not require you to wear protective glasses and can be viewed safely with the naked eye.