Maximally gravitationally collapsed object predicted to exist by the theory of general relativity, from which no material object, light or signal of any kind can escape. Many black holes form when a high mass supergiant Self-luminous object held together by its own self-gravity. Often refers to those objects which generate energy from nuclear reactions occurring at their cores, but may also be applied to stellar remnants such as neutron stars. explodes in a Stellar explosion that expels much or all of the stellar material with great force, driving a blast wave into the surrounding space, and leaving a supernova remnant. Supernovae are classified based on the presence or absence of features in their optical spectra taken near maximum light. They were first categorized explosion at the end of its life. A star probably must have a mass of >40 Msun to leave a ~3 Msun black hole. Black holes are detected by the effects they have on neighboring stars. The centers of most galaxies, including our own, contain super-massive black holes which have sucked in thousands of stars.
Some or all content above used with permission from J. H. Wittke.