Hypothetical Object
Fuzzball
A string-theory replacement for a black hole.
A string-theory proposal in which classical black holes are replaced by extended, horizonless 'fuzzy' configurations of strings and branes.
Overview
A string-theory proposal in which classical black holes are replaced by extended, horizonless 'fuzzy' configurations of strings and branes.
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.
Planck Star
A bouncing quantum-gravity remnant inside a black hole.
Gravastar
A black-hole alternative made of exotic vacuum.
Black Dwarf
A theoretical cold white-dwarf remnant.
Blue Dwarf
A predicted future fate for some red dwarfs.