PHILADELPHIA (CBS) — The clear skies tonight will make excellent viewing conditions for a supermoon.

The last supermoon we had in the Philadelphia area was June 23, 2013.

A supermoon generally occurs maybe once a year. This year it will occur three times in the summer. One Friday tonight into Saturday, one again on August 10, and again on September 9.

It will be at its fullest point tomorrow morning around 7:25 a.m.

Supermoon basically means the moon’s orbit is at its closest point to the earth, making the moon appear larger than other full moons we see during the year.

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