A solar eclipse occurs when the moon gets in the way of the sun’s light and casts its shadow on the Earth.

While a remarkable occurrence, eclipses are actually not that rare. According to NASA, a total solar eclipse happens about every year and a half somewhere on Earth. A partial eclipse, when the moon doesn’t completely cover the sun, happens at least twice a year somewhere on the planet.

That doesn’t mean everyone gets to experience an eclipse that often, however. As NASA explains, the moon’s shadow on Earth isn’t very big, so only a small portion of places on Earth will see it at any given time and you will have to be on the sunny side of the planet when it happens. You also have to be in the path of the moon’s shadow.

On average, the same spot on Earth only gets to see a solar eclipse for a few minutes about every 375 years, NASA said.

The Great American eclipse on Monday was the first total solar eclipse experienced in North America since 2017. The next total solar eclipse that will be visible in the U.S. will be on March 30, 2033 and then only Alaska will get the full show. The rest of the U.S. will see only a partial eclipse.

A total solar eclipse won’t be visible again in the contiguous U.S. until Aug. 22, 2044 and then with totality in only two states – North Dakota and Montana. Then, a year later on Aug. 12, 2045, a total solar eclipse will be visible across the U.S. with the path of totality – the area of greatest darkness – cutting across California, Nevada, Utah, Colorado, Kansas, Oklahoma, Arkansas, Mississippi, Alabama and Florida. The rest of the country will see a partial eclipse.

Want to see a complete list of eclipses? You can see more here.