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Six Colors

by Jason Snell & Dan Moren

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By Jason Snell for Yahoo Tech

Planet Nine? Evidence grows for big addition to solar system

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.

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