So I was doing some research on Nemesis(Hypothetical star.) Read about it here:http://en.wikipedia.org/wiki/Nemesis_(hypothetical_star) Then found out about 90377 Sedna, IF this is Planet X then, it can come towards earth at any time... (Of course I don\'t believe in 2012 but, Planet X could still be there but hit the earth at a different time.) So, evidence suggest\'s that 90377 Sedna WAS I repeat WAS in our solar system, but was pushed away. Probably within the gap between the last planet and Pluto.(If Pluto was formed yet...) So, this EX-Planet could be Planet X. Does anyone else agree post why or why not in the comments.