What scientists know so far about Planet Nine

(Credit: Salon/Ilana Lidagoster)

Is there a ninth planet in our solar system? That’s a conclusion many astronomers are leaning toward, and scientist Jackie Faherty joined Salon’s Alli Joseph on “Salon Talks” to explain why.

Faherty is a senior scientist and senior education manager in the department of astrophysics and the department of education at the American Museum of Natural History, and she said that most of the evidence pointing to a ninth planet “comes from looking at...

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