What is a supermoon? The technical name is the perigee-syzygy of the Earth-Moon-Sun system. What? In simple terms, a supermoon is just a very big and bright looking moon. For the astrologers and for those who would like a little more detail here is a video from Science at NASA with all the technical terms describing a supermoon: 2016 Ends with Three Supermoons.
The moon will appear up to 14% bigger and 30% brighter than an average full moon. The supermoon on November 14, 2016 will bring the moon closer to Earth than it has been since January 26, 1948. This “extra supermoon” will not occur again until November 25, 2034.