CAPE CANAVERAL, Fla. — Scientist said they finally have solid evidence for Planet X, a true ninth planet on the edge of our solar system.
The gas planet is thought to be almost as big as Neptune and orbiting billions of miles beyond Neptune's path, far enough to take 10,000 to 20,000 years to circle the sun.
Planet 9, as two Caltech researchers call it, hasn't been spotted yet. They base their findings on mathematical and computer modeling, and anticipate its discovery within the next five years.
Once detected, the researchers insist there will be no Pluto-like planetary debate because one of the researchers, Mike Brown, is the so-called Pluto killer.