Hypothetical Object
Black Dwarf
A theoretical cold white-dwarf remnant.
A white dwarf that has cooled to the point of emitting no significant heat or light. The universe is not old enough for any to exist yet.
Overview
A white dwarf that has cooled to the point of emitting no significant heat or light. The universe is not old enough for any to exist yet.
See also
White Hole
A theoretical time-reverse of a black hole.
Wormhole (Einstein–Rosen Bridge)
A theoretical tunnel through spacetime.
Blue Dwarf
A predicted future fate for some red dwarfs.
Gravastar
A black-hole alternative made of exotic vacuum.
Quark Star
A neutron star compressed into quark matter.
Strange Star
A star made of strange quark matter.