On Jan. 20, 2016, scientists announced the discovery of what could be a giant planet in the Kuiper Belt at the outer edge of our solar system. Nicknamed "Planet Nine," the world is a behemoth - about 10 times the mass of the Earth. It would take the planet between 10,000 and 20,000 years to orbit the sun.
The mythical "Planet X" may actually be real, and scientists are calling it "Planet Nine."
Astronomers have found evidence for a planet 10 times more massive than Earth in the far outer solar system, orbiting about 20 times farther from the sun than distant Neptune does.
"This would be a real ninth planet," one of the researchers, Mike Brown of the California Institute of Technology (Caltech) in Pasadena, said in a statement. "There have only been two true planets discovered since ancient times, and this would be a third. It's a pretty substantial chunk of our solar system that's still out there to be found, which is pretty exciting.
http://www.space.com/31671-planet-ni...fographic.html
