This one has a better case, from what I understand.. but in 2006 and 2014 and even last month there were Ninth Planet papers written. This one is interesting because, again, from what I understand, it shows how the math holds up pretty well, above and beyond observation. Last month there was an actual observation, but it was a false alarm sort of. This one, if its not a planet, we know there is SOMETHING out there with a certain amount of mass. Ironically, since the guy who found this one is the guy who kicked Pluto out of the planet club is the guy who found this ..its not clear this new planet would meet the criteria either. Certainly its big... but one of the criteria is to clear its own orbit.. the orbit of this thing, if its real, is so elongated and distant it seems unlikely it would clear its own orbit.. but the guy is sure its a planet so who knows. Its interesting.
For me the most interesting thing is..this rash of Ninth Planet-ness etc really indicates how we are just now getting to know the outer part of our solar system, and there going to be exciting discoveries out there..even if this one like the ones before ends up not being real.
“If somebody thinks they're a hedgehog, presumably you just give them a mirror and a few pictures of hedgehogs and tell them to sort it out for themselves.”