Unlike the other large galaxies of the Local Group, Triangulum has only a very weak and diffuse bar in its nucleus. It is also set apart by the absence of a supermassive black hole at its centre- many stellar-mass black holes are located here, however. It is very rich in hot stars only a few million years old (most recent starburst occurred 70 million years ago), radiating large quantities of ultraviolet radiation, and these are accompanied by a slightly older population of smaller stars a few billion years old. The remnants of previous generations of large stars are evident in the form of neutron stars and stellar mass black holes.
The core contains a large number of X-ray sources, some explained but others remaining anomalous. One ultraluminous X-ray source is the most luminous such object in the Local Group.
There are several notable locations in the Triangulum Core Zone.