On Sunday, September 27th, skywatchers will witness the grand finale of the rare lunar eclipse tetrad (series of four consecutive total lunar eclipses). And it promises to be quite a show. That's because this one involves a full moon and perigee. This means that the celestial body will be at its closest distance to earth, giving it a larger than life appearance. The last time the world witnessed this phenomenon was in 1982, and the next one will not be until 2033!