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gizmodo.com Our Sun May Have Snatched Planet 9 From Outside the Solar System

Those with a Pluto-the-planet-shaped void in their hearts have been eagerly following updates about Planet 9, a hypothetical world thought to be 10 times more massive than Earth and roughly 1,000 astronomical units (AU) away from the Sun. While there are naysayers aplenty, new research validates believers — and delivers some unexpected news about the planet’s rough childhood.
gizmodo.com