NGC 1399 is a large elliptical galaxy in the Southern constellation Fornax, the central galaxy in the Fornax Cluster. The galaxy is 66 million light-years away from Earth. With a diameter of approximately 365,000 light-years, it is one of the largest galaxies in the Fornax Cluster and considerably larger than the Milky Way. William Herschel discovered this galaxy on October 22, 1835.