Photos: The supermoon rises over Colorado

<p>The supermoon rises over the White River National Forest in Summit County. (<a href="" target="_blank" rel="noopener noreferrer">Photo courtesy Daniel McVey.</a>)</p>

… a new or full moon which occurs with the moon at or near (within 90% of) its closest approach to Earth in a given orbit.

That’s a pretty generous definition and allows for many supermoons. By this definition, according to Nolle:

There are 4-6 supermoons a year on average.