Hypothetical Object
Traversable Wormhole
A hypothetical wormhole one could pass through.
A wormhole stable enough for matter to pass through both ways. Theoretical solutions require exotic, negative-energy matter.
Overview
A wormhole stable enough for matter to pass through both ways. Theoretical solutions require exotic, negative-energy matter.
See also
Mirror Matter Star
A star made of hypothetical mirror matter.
Black Dwarf
A theoretical cold white-dwarf remnant.
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.