Wait, there's a ninth planet? A ninth planet that's not Pluto?
Apparently there is, according to researchers who say the evidence is mounting that a big, super-Earth sized planet is hanging out on the far corners of our solar system. So if it's real, how come no one has officially discovered it yet? How do they know it's there? What does this mean for our group of planets? Is Pluto going to sue over its status or what?
In our Monthly Science Roundtable, we explore the search for Planet Nine, and we talk all things space. Our guests: