Second supermoon of the summer is tonight

(AP Photo/Andy Wong)
Click here for more supermoon photos!
Click here for more supermoon photos!

NEW YORK (AP) — The full moon on Sunday will appear to be unusually big. In fact, it will be a “supermoon.”

That’s the nickname for full moons that happen when our celestial neighbor is relatively close to Earth. That distance varies because the moon follows an elliptical orbit. When it’s close and full, it appears bigger and brighter than normal, although in fact the difference can be hard to detect.

If you see Sunday’s moon close to the horizon it may seem huge, but that’s just an illusion caused by its position in the sky.

The first supermoon was on July 11, and the last supermoon of the summer is on Sept. 9.

It’s not all that unusual to have a supermoon. There were three in a row last year.

For more information about the supermoon, click here.

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