"50,000 AU is a lot of space. There could be a planet out there bigger than Jupiter and we wouldn't know about it. There could even be a brown dwarf star and its own planetary system and we wouldn't know... It's hard to know a new planet, or quasi-planetary object, or non-cometary comet-like object, or whatever they are called has been discovered just by reading threads since most all threads are carbon copies of all that went before. Same tired joke, same comments. There could be the other component of our binary star system out there, that's how little we know, and yet some are complaining that we spend too much money on the space program."
Far-out worlds, just waiting to be found
New Scientist | 23 July 2005 (issue date) | Stuart Clark
Posted on 07/20/2005 10:54:18 PM PDT by SunkenCiv
http://www.freerepublic.com/focus/f-chat/1447339/posts
"'It's quite possible that there is a halo of planets surrounding our solar system, just waiting to be found,' says Eugene Chiang, an astronomer at the University of California, Berkeley."