NASA is skeptical: "It's too early to say with certainty there's a so-called Planet X out there." http://www.vox.com/science-and-health/2016/1/21/10806662/nasa-new-planet-nine-response …
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NASA is skeptical: "It's too early to say with certainty there's a so-called Planet X out there." http://www.vox.com/science-and-health/2016/1/21/10806662/nasa-new-planet-nine-response …