The Solar System may have a 9th planet after all. Nine years after Pluto was demoted to dwarf status, scientists say they’ve found something much bigger -- and also much farther away.
So-called Planet 9 was predicted by complex computer models, but it has yet to be identified by eye, with telescopes. Astronomer Doug Duncan, the director of Boulder's Fiske Planetarium, spoke with Colorado Matters' Andrea Dukakis.
Where to see five planets in the pre-dawn sky: 
