December 1, 2010 - Our sun may have a companion that disturbs comets from the edge of the solar system - a giant planet with up to four times the mass of Jupiter, researchers suggest.
A NASA space telescope launched last year may soon detect such a stealth companion to our sun, if it actually exists, in the distant icy realm of the comet-birthing Oort cloud that surrounds our solar system with billions of icy objects.











