Supermoon! What is it and how often does it occur?

Supermoon! What is it and how often does it occur?
The answer lies with where the moon is during its orbit of Earth. [Supermoon Facts](https://www.space.com/38940-supermoon-facts.html) Credit: Space.com / animation and imagery courtesy NASA Goddard Space Flight Center / produced and edited by [Steve Spaleta](http://www.twitter.com/stevespaleta)
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The answer lies with where the moon is during its orbit of Earth. [Supermoon Facts](https://www.space.com/38940-supermoon-facts.html) Credit: Space.com / animation and imagery courtesy NASA Goddard Space Flight Center / produced and edited by [Steve Spaleta](http://www.twitter.com/stevespaleta)