A NASA probe’s epic encounter with a small physique within the far outer photo voltaic system is telling us rather a lot about how planets are born.

On Jan. 1, 2019, the New Horizons spacecraft zoomed inside simply 2,200 miles (3,540 kilometers) of Arrokoth, a 22-mile-wide (36 kilometers) object within the Kuiper Belt, the ring of frigid our bodies past Neptune’s orbit. 




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