imagePaul Rodgers in The Independent:

If you grew up thinking there were nine planets and were shocked when Pluto was demoted five years ago, get ready for another surprise. There may be nine after all, and Jupiter may not be the largest.

The hunt is on for a gas giant up to four times the mass of Jupiter thought to be lurking in the outer Oort Cloud, the most remote region of the solar system. The orbit of Tyche (pronounced ty-kee), would be 15,000 times farther from the Sun than the Earth’s, and 375 times farther than Pluto’s, which is why it hasn’t been seen so far.

. . . So if it is real, Tyche may not only be disrupting the orbits of comets, it may also overturn an established scientific theory.

Scientists changing their mind? Of course. It’s normal. So ask them about the carbon dating of the Shroud of Turin.

But then again it might not be a planet According to CNN,

Some scientists think a brown dwarf or gas giant bigger than Jupiter could be at the outer reaches of the solar system.

Picture is from CNN.

Independent report is Up telescope! Search begins for giant new planet – Science, News – The Independent