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Planets

Is There A Ninth Planet In The Solar System?

In January of 2016, researchers Konstantin Batygin and Michael E. Brown shared mathematical evidence of a ninth planet in the solar system. Their evidence was grounded in the curiously clustered orbits of several Kuiper belt objects, which could be explained by the gravitational pull of a planet, but not by the gravity of the objects themselves. They hypothesized that the planet would be around 10 times as massive as Earth, with an orbit around the sun that lasts between 10,000 and 20,000 years. The search for the planet is now underway, and the stakes are high: whoever discovers it gets to name it!

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Key Facts In This Video

  1. Scientists have found evidence for a large ninth planet in the outer solar system. 00:28

  2. A large planet in the outer solar system could explain the orbits of several Kuiper belt objects. 03:19

  3. The theoretical ninth planet is probably a gaseous ice giant, similar to Uranus or Neptune. 06:07

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