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Scientific American

New Horizons May Have Solved Planet Formation Cold Case

20 Feb 2020, 14:22 UTC
New Horizons May Have Solved Planet Formation Cold Case NASA, Johns Hopkins University Applied Physics Laboratory, Southwest Research Institute and Roman Tkachenko

Not that long ago, it seemed the glory days of NASA’s New Horizons mission were in the rearview mirror, left behind with its historic Pluto encounter in 2015. Then, early last year, the spacecraft streaked by Arrokoth, a bit of flotsam drifting through the Kuiper Belt—the diffuse ring of primitive icy bodies beyond Neptune, of which Pluto is the largest member. 

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