Hypothetical Object
Planck Star
A bouncing quantum-gravity remnant inside a black hole.
A hypothetical compact object that forms when a collapsing star reaches the Planck density, halting the collapse via quantum-gravity effects.
Overview
A hypothetical compact object that forms when a collapsing star reaches the Planck density, halting the collapse via quantum-gravity effects.
See also
White Hole
A theoretical time-reverse of a black hole.
Dark Matter Spike
A density enhancement of dark matter around a black hole.
Fuzzball
A string-theory replacement for a black hole.
Black Dwarf
A theoretical cold white-dwarf remnant.
Gravastar
A black-hole alternative made of exotic vacuum.
Blue Dwarf
A predicted future fate for some red dwarfs.