Planet larger than Jupiter may be orbiting at outer edge of the solar system

No, there’s no proof of a giant planet in the outer solar system http://mblogs.discovermagazine.com/badastronomy/2011/02/14/n...

I remember reading a theory of such a planet before, hmm.

It's orbit would probably be a bit erratic, I would think just as there is little light out there, there also would be far less gravity from the sun's gravity well?

If it's larger than Jupiter, it would likely have it's own moons and probably be a failed star?

Ah, it's called "Planet X" and they've been looking for it since 1978

http://en.wikipedia.org/wiki/Planets_beyond_Neptune#Further_...

Also from the article: http://i.imgur.com/AwCC8.png

It would be nice to see the Nemesis theory confirmed (or eventually disproven). See http://en.wikipedia.org/wiki/Nemesis_%28star%29 for more.