Ninth planet
'Ninth planet' may exist in solar system, say US scientists
American astronomers say they have strong evidence that there is a ninth planet in our Solar System orbiting far beyond even the dwarf world Pluto.
January 21, 2016
'Ninth planet' may exist in solar system, say US scientists
American astronomers say they have strong evidence that there is a ninth planet in our Solar System orbiting far beyond even the dwarf world Pluto.
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