Support this Site
Become a Six Colors member and get access to an exclusive weekly podcast, community, newsletter and more.
Jason Snell for Yahoo Tech
January 20, 2016 2:25 PM PT
A decade ago Mike Brown helped get Pluto demoted from a “planet” to a mere “dwarf planet.” Now the astronomer and one of his CalTech colleagues may have plotted the orbit of a new ninth planet in our solar system, dramatically larger than Pluto and much, much farther away.