Tag: planet x (3 results)

10-30-2018 - More Evidence That Planet 9X — At Least Seven Times Earth’s Mass — Is Hidden in Kuiper Belt!
03-28-2008 - Earth-Size Planet Beyond Pluto and Kuiper Belt?
09-15-2005 - “Planet X” and the Kuiper Belt’s Oddballs, “Santa” and “Easterbunny”