Planet 9 from outer space
Astronomers think they've discovered signs of a planet way beyond Pluto
Now, Dr. Mike Brown, a professor of Planetary Astronomy at the California Institute of Technology, is putting his reputation on the line by suggesting that he can see evidence of a nearly Neptune-sized planet perturbing the orbits of dwarf planets in the Kuiper Belt.
This hypothetical ninth planet would have a highly elliptical orbit, and circle the sun every 10 to 20 thousand years. Dr. Brown and his colleagues are now searching the skies for the faint and distant body using powerful telescopes.