Astronomer Insists There's A Planet X Four TimesThe Size Of Earth Lurking At The Edge Of Our Solar System

http://www.thesciencenews.info/2012/06/astronomer-insists-theres-planet-x-four.html

Un Youtubber qui publie des documentaires très intéressants sur le sujet:
http://www.youtube.com/user/theoferrum