The new 10th planet is tentatively being called 2003-UB313. The object was originally discovered in 2003, but its status as a planet was only determined this year. As astronomers detected that it was rotating around the sun, they realized that they had discovered a previously unknown planet.

According to Mike Brown, a planetary scientist at the California Institute of Technology, “The new object is covered in methane ice and lies nine billion miles from earth and it’s the farthest object ever discovered to orbit around the sun. I’d say it’s probably one and a half times the size of pluto.”

Astronomers have proposed a name for the planet to the science’s governing body, the International Astronomical Union, and are awaiting the decision before announcing it. Once the name is announced, we will be sure to announce it here.