Scientists, telescope hunt massive hidden object in space

[Trudy]

Some scientists think a brown dwarf or gas giant bigger than Jupiter could be at the outer reaches of the solar system. In this image showing relative size, the white object at the upper left edge represents the sun.

http://news.blogs.cnn.com/2011/02/15/scientists-telescope-hunt-mass...

[Trudy]

http://www.space.com/10895-nasa-wise-space-telescope-mission-ends.html

[Simmy]

Hummm...is it Nemesis or is it Tyche...?
Thanks Trudy!