SAN FRANCISCO (KCBS) — If you’re a fan of super moons, you’re in for the treat of the century – so far.

NASA says an “extra-super moon” will light up the night sky November 14th, and it will be the closest one to date in the 21st century.

A super moon occurs when a new or full moon is ”within 90-percent of its closest approach to Earth in a given orbit,” according to NASA.

A super moon coming up on December 14th will become full on the same day as perigee, the point in the moon’s orbit when it is nearest to the earth.

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The November 14th super moon will become full within two hours of perigee, making it extra special.

“A supermoon, or perigee full moon can be as much as 14-percent bigger and 30-percent brighter than an apogee full moon,” according to the agency.

But, the December 14th super moon will wipe out the view of the Geminid meteor shower with its brightness.