Evidence for Planet 9 found in icy bodies sneaking past Neptune

More evidence for a hypothetical extra planet lurking in the most distant reaches of our solar system has come to light — and the clues are associated with icy bodies that cross the orbit of Neptune while traversing  long, looping paths around the sun.

Planet Nine, as the predicted planet is referred to, was first postulated in 2016 by Caltech’s Konstantin Batygin and Michael Brown, the latter having also discovered the dwarf planet Eris in 2005. Their original evidence predominantly focused on the clustering of trans-Neptunian objects (TNOs), which are objects that spend the majority of their orbits farther from the sun than Neptune is. That’s quite far. More specifically, the duo had zoomed in on TNOs with high inclinations, meaning the objects orbited the sun at steep angles to the ecliptic plane. 

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