A partial solar eclipse will occur over the weekend, but it will only be visible depending on where you are in the world, according to NASA.

The eclipse, which will occur on Sunday, Sept. 21, will not be visible in the U.S., but it will be visible in Australia, Antarctica, the Pacific Ocean, and the Atlantic Ocean, according to the agency .

This is the second eclipse to occur in September. The first was a total lunar eclipse that occurred from Sept. 7 to Sept. 8, but that eclipse wasn't visible in the U.S. either.

So, here's everything you need to know about the partial solar eclipse, when it is, and how it happens.

What is a partial solar eclipse?

A partial solar eclipse occurs when the Moon passes between the Sun and the Earth, but the three bodies are not perfectly aligned, accor

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