NASA has released more than 50 new Hubble images featuring 30 galaxies, star clusters, and nebulae. All of these objects belong to a collection known to astronomers as the Caldwell catalog. This Hubble images shows Caldwell 45, a spiral galaxy located 59 million light-years away in the constellation Boötes. Also known as NGC 5248, this galaxy is notable for the ring structure around its nucleus. These nuclear rings are characterized by hot spots...
