Pluto

Pluto’s Planet Status could be Jeopardized by Sedna Discovery
http://www.space.com/scienceastronomy/s … 40317.html

Weird Object Beyond Pluto Gets Stranger
http://www.space.com/scienceastronomy/h … 40414.html

Scientists Find Another Huge Mini-World in Outer Solar System
http://www.space.com/scienceastronomy/n … 40315.html

Distant Sedna Raises Possibility of Another Earth-Sized Planet in Our Solar System
http://www.space.com/scienceastronomy/s … 40316.html

Controversial Proposal Would Boost Solar System’s Planet Tally to 12
http://www.space.com/scienceastronomy/p … 30227.html