http://ift.tt/1OwKAfE Presently the details are sketchy. A Neptune-ish size orb out past Neptune – semi-major axis about x20 Neptune, perihelion about 200 AU, and a period of roughly 10,000 years. The discovery paper is here: EVIDENCE FOR A DISTANT GIANT PLANET IN THE SOLAR SYSTEM What would it be like? Odds are, if it’s one … Continue reading "Planet IX?"
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Telescopically 