Planet Nine

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May 3, 2016

Planet nine in deep space — Download hires_16.jpg

Artist's conception of Planet Nine.

Courtesy Caltech/R. Hurt (IPAC)

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Astrophysical Observatory

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Planet Nine: A World That Shouldn’t Exist

Earlier this year scientists presented evidence for Planet Nine, a Neptune-mass planet in an elliptical orbit 10 times farther from our Sun than Pluto. Since then theorists have puzzled over how this planet could end up in such a distant orbit.
- May 3, 2016
- News Release
- Astrophysical Observatory

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