Planet Nine: Suspected but as yet an undiscovered planet that
(along with Neptune) affects the
orbits of many dwarf planets and outer-fringe solar system entities.
Rogue Planet: Called SIMP J01365663+0933473 and discovered in
2016 AD. Located 20 light-years from Earth. Mass is 12.7 times greater than Jupiter; size is between being
a gas giant planet and a brown dwarf star.