LAS VEGAS, NV - SEPTEMBER 27:  An eclipsed supermoon rises behind the Las Vegas Strip on September 27, 2015 in Las Vegas, Nevada. A supermoon occurs when a full moon coincides with its perigee, which is its closest approach to the Earth. A total lunar eclipse and a supermoon won't occur together again until 2033.  (Photo by Ethan Miller/Getty Images)