Rogue planet in solar system: Is there another true planet beyond Neptune?

Is There a Rogue Planet Lurking Far Out in the Solar System? (Video.)

The state of the universe.
March 31 2014 3:14 PM

The Rogue Planet

What lies in the furthest reaches of the solar system?

Astronomers report in Nature that they’ve discovered a probable dwarf planet that orbits the sun further out than Pluto, which is notable in its own right. But it may point to something bigger: a rogue planet hiding in the icy furthest reaches of our solar system.

Paca Thomas is a regular video contributor to Slate.

  Slate Plus
20x
June 29 2015 11:55 AM Supreme Court Blogs, TV Recaps, and Wikipedia  What a legal-affairs writer visits on the Internet more than 20 times a month.