Monday night’s Harvest Moon was also a supermoon. Supermoons are full moons that occur when the orbit path is closest to Earth. This moon appears bigger and brighter than a typical full moon. A “Harvest Moon” is the full moon closest to the vernal equinox (September 23 this year). The supermoon reached the crest of its full phase on September 8 at precisely 8:38 p.m. CDT.