"I like to think of the supermoon as a good excuse to start looking at the moon more regularly," said Noah Petro, project scientist for NASA's Lunar Reconnaissance Orbiter.
"Unless you have looked at a lot of full moons or compare them in images, it is hard to notice the difference, but people should try," Petro said in an email.
August's supermoon kicks off a string of lunar spectacles. September's supermoon will coincide with a partial lunar eclipse.
A supermoon occurs when a full lunar phase syncs up with an especially close swing around Earth, usually three or four times a year.
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