Is Planet Nine Hiding at the Edge of the Solar System?

Planet Nine could exist at the most distant reaches of our solar system, according to observations of the orbits of far-flung objects. This theoretical world would be 10 times as massive as Earth, and take between 10 and 20,000 years to orbit the Sun. However, such a planet would be so dark and distant that some astronomers speculate it may be 1,000 years before we discover it.

Read More Is Planet Nine Hiding at the Edge of the Solar System?
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