Compact star
In astronomy, the term compact star or compact object is used to refer collectively to white dwarfs, neutron stars, other exotic dense stars, and black holes.
Most compact stars are at the end of their stellar evolution. They are called stellar remnants: the form of the remnant depends mainly on the mass of the star when it formed. These objects are small for their mass. Astronomic objects with an unknown nature are often called compact star, when evidence suggests that they are very massive and that they have a small radius. A compact star which is not a black hole is sometimes called a degenerate star.
Compact Star Media
The Eskimo Nebula is illuminated by a white dwarf at its center.
Formerly a white dwarf, V838 Monocerotis has accreted enough material to become a red supergiant.
The Crab Nebula is a supernova remnant containing the Crab Pulsar, a neutron star.
A simulated black hole of ten solar masses, at a distance of 600 km
