Hypothetical stars

stellar remnant; white dwarf that has cooled sufficiently that it no longer emits significant light

hypothetical star orbiting the Sun, responsible of extinction events

hypothetical class of star

hypothetical type of exotic star

hypothetical compact star with an exotic state of matter

thumb|alt=|upright=1.3|An artist’s impression of a quasi-star, showing a black hole core residing in the massive photospheric envelope of the object

hypothetical class of compact stars

hypothetical compact star composed of exotic matter

a red giant or other such star with a neutron star as its core

hypothetical astronomical object heated by dark-matter annihilation

thumb|A diagram comparing the structure of a classical black hole with a gravastar.

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quark star made of strange quark matter

gravitational object composed of matter

hypothetical astronomical object, theorized as a compact, exotic star, that exists within a black hole's event horizon, created when the energy density of a collapsing star reaches the Planck energy density

object composed of dark energy that outwardly resembles a black hole

In astronomy, blitzars are a hypothetical type of neutron star, specifically pulsars that can rapidly collapse into black holes if their spinning slows down. Heino Falcke and Luciano Rezzolla proposed these stars in 2013 as an explanation for fast radio bursts.

quantum description of black holes

compact object with an intrinsic magnetic field that collapses continuously without forming an event horizon

star

hypothetical population of extremely massive and bright stars in the early universe