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Heads up! Supermoon is here

Published: Saturday, July 12 2014 10:00 p.m. MDT

A perigee moon, also known as a supermoon, is seen behind a lantern, used as decoration during the Muslim holy month of Ramadan, at a shop in Cairo, Egypt, Sunday, July 13, 2014. The phenomenon, which scientists call a "perigee moon," occurs when the moon is near the horizon and appears larger and brighter than other full moons. (AP Photo/Amr Nabil)

Amr Nabil, AP

Look! Up in the sky! It's supermoon!

Because our celestial neighbor is relatively close to Earth, these full moons will appear to be unusually large. That distance varies because the moon follows an elliptical orbit. When it's close and full, it appears bigger and brighter than normal, although the difference can be hard to detect.

The full moon Saturday may seem huge, but it's just an illusion caused by its position in the sky.

Two other supermoons will come later this summer on Aug. 10 and Sept. 9.

Check out these supermoons from around the world:

Online: NASA on supermoons: http://1.usa.gov/1jxZkPt

Follow AP photographers on Twitter: http://apne.ws/XZy6ny

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