dark star

Astronomy, Natural sciences, Physical sciences, Physics An extremely bright and massive hypothetical astrophysical object whose illumination is powered by annihilation of dark-matter particles and anti-particles (or by self-annihilation if they are Majorana particles).

Astronomy, Natural sciences, Physical sciences, Physics Obsolete A black hole: star so massive that its escape velocity is above the speed of light, making the star dark, as no light can escape.

Used other than figuratively or idiomatically: see dark, star.