A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar system.
Scientists will search the sky Thursday for an undiscovered planet in the outer solar system — they're pretty sure it's out there, and computer models tell them where to look.
The object known for now as 2014 UZ224 is only about 330 miles across and takes 1,100 years to orbit the sun. But one of the most interesting things about it is the way researchers found it.
Earlier this year, a pair of scientists predicted the existence of a ninth planet based on computer modeling of the solar system. This fall, the race is on to be the first to spot it in a telescope.
Planet Nine, as scientists are calling it, deserves a better name if it becomes reality. Should it be Plutoo? Or Plutwo? Yeah, we know you can do better, so come brainstorm with us.