The astronomer known worldwide for vigorously promoting the demotion of Pluto from its decades long perch as the 9th Planet, has now found theoretical evidence for a new and very distant gas giant planet lurking way beyond Pluto out to the far reaches of our solar system.
The possible planet has a mass about 10 times that of Earth and is believed to be gaseous, like Uranus and Neptune, according to Mike Brown of Caltech, who became famous during the contentious debate on Pluto’s planetary status.
The giant new planet orbits the sun some 20 times farther out than Neptune in the distant reaches of the Kuiper Belt. Neptune orbits the sun at an average distance of 2.8 billion miles (4.5 Billion km).
The theorized ‘Planet Nine’ travels in a highly elongated path that takes between 10,000 and 20,000 years to complete just one full orbit around the sun, according to Caltech statement describing the work."