Galaxy NGC1300. NGC 1300 is a barred spiral galaxy about 61 million light-years away in the constellation Eridanus. The galaxy is about 110,000 light-years across (about 2/3 the size of the Milky Way). It is a member of the Eridanus Cluster, a cluster of 200 galaxies. In the core of the larger spiral structure of NGC 1300, the nucleus shows a "grand-design" spiral structure, a spiral within a spiral, that is about 3,300 light-years long.