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Scientists have discovered yet another marker on the trail toward the putative Planet Nine.

That clue is 2015 TG387, a newfound object in the far outer solar system, way beyond Pluto. The orbit of 2015 TG387 shares peculiarities with those of other extremely farflung bodies, which appear to have been shaped by the gravity of a very large object in that distant, frigid realm—the hypothesized Planet Nine, also known as Planet X.

“These distant objects are like breadcrumbs leading us to Planet X,” study leaderScott Sheppard, of the Carnegie Institution for Science in Washington, D.C., said in a statement. [The Evidence for ‘Planet Nine’ in Our Solar System (Gallery)]

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