Thanks to data collect from NASA's WISE telescope, a possible new planet 4 times the mass of Jupiter is possibly lurking out in the Oort Cloud located some 375x further out then Pluto.
http://www.independent.co.uk/news/sc...-2213119.html#
and
http://www.huffingtonpost.com/2011/0..._n_823028.html
Interesting stuff if it turns out to be real aye?