While searching for evidence of a huge planet lurking beyond Pluto's orbit dubbed "Planet Nine," astronomers made a surprise discovery: a previously undetected dwarf planet flying through the darkness. They've nicknamed it "the Goblin," and this little world could help us uncover the secret of the much larger Planet Nine.
What is Planet Nine, Anyway?
Evidence for Planet Nine Piles up
Written by Elizabeth Howell October 2, 2018
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