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'Supermoon' Visible Friday, Saturday Nights
The summer of Supermoons kicks off this weekend.
NASA says this summer's full moons will all be "Supermoons."
The first will be visible tonight and tomorrow night.
The scientific term for the phenomenon is "Perigee Moon"; it makes the moon appear larger and brighter.
It will happen again August 10th and September 9th.
Experts say the one on August 10th will likely be the brightest.
Although scientists stress that sometimes it's hard to tell the difference between a Supermoon and a regular full moon, as clouds and haze can mask a difference in brightness.