In 2016, scientists Michael Brown and Konstantin Batygin suggested that an unseen Planet Nine could explain the unusual orbits of some Kuiper Belt objects, sparking interest in its possible existence
If you accept Pluto, you have to accept at least half a dozen trans-Neptunian objects as well as the asteroid Ceres, in which case planet nine already exists and would be Neptune. Well, most of the time anyway. Sometimes Pluto passes inside Neptune’s orbit.
Or maybe you’d like to consider Triton, Neptune’s retrograde moon as a planet as well, on account of how it was probably a dwarf planet in its own right until Neptune plucked it out of its orbit. Once a planet, always a planet, right? Neptune even tried to do the same to Pluto which is why it has such a weird orbit.
Be team dwarf planet. Lots of new friends outside the regular eight, and Pluto’s a founder member.
If you accept Pluto, you have to accept at least half a dozen trans-Neptunian objects as well as the asteroid Ceres, in which case planet nine already exists and would be Neptune. Well, most of the time anyway. Sometimes Pluto passes inside Neptune’s orbit.
Or maybe you’d like to consider Triton, Neptune’s retrograde moon as a planet as well, on account of how it was probably a dwarf planet in its own right until Neptune plucked it out of its orbit. Once a planet, always a planet, right? Neptune even tried to do the same to Pluto which is why it has such a weird orbit.
Be team dwarf planet. Lots of new friends outside the regular eight, and Pluto’s a founder member.