Scientists: Good evidence for 9th planet in solar system

(AP) — Scientists reported Wednesday they finally have "good evidence" for Planet X, a true ninth planet on the fringes of our solar system.

The gas giant is thought to be almost as big as Neptune and orbiting billions of miles beyond Neptune's path — distant enough to take 10,000 to 20,000 years to circle the sun.

Brown ought to know; he's the so-called Pluto killer who helped lead the charge against Pluto's planetary status in 2006.

"For the first time in more than 150 years, there's good evidence that the planetary census of the solar system is incomplete," Batygin said, referring to Neptune's discovery as Planet 8.

The two shaped their prediction on the fact that six objects in the icy Kuiper Belt, or Twilight Zone on the far reaches of the solar system, appear to be influenced by only one thing: a real planet.

Brown actually discovered one of these six objects more than a decade ago, Sedna, a large minor planet way out there on the solar system frontier.

What we have found is a gravitational signature of Planet 9 lurking in the outskirts of the solar system,' Batygin said.