Using the orbits of six icy bodies in the Kuiper Belt, Brown found that they all move differently, but all face the same direction. They are all tilted about 30 degrees in the same direction- and, according to Brown, that means something is governing their orbits. Enter a new planet lovingly named Planet 9, at least until someone comes up with something better.
I look forward to the first "articles" that come out suggesting its an alien megastructure. For now however, I'd like to be the first to welcome this new theoretical planet into our family. Welcome to our solar system Planet 9- long may you wander around our Sun.
Check out the original article here.