January 20, 2016 5:40 pm

Astronomers Say New Ninth Planet Discovered

Caltech researchers announced today they have found evidence of a giant ninth planet that they’ve nicknamed Planet Nine. Although they haven’t actually seen it, researchers Konstantin Batygin and Mike Brown said they discovered the planet’s existence through mathematical modeling and computer simulations. Lolita Lopez reports for the NBC4 News at 5 p.m. on Wednesday, Jan. 20, 2016.

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