Arrakoth (New Horizons)
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NASA/ESA/CSA/STScI
Though not on Webb’s target list, Arrokoth is probably exemplary of a lot of objects in the Kuiper Belt. The farthest object ever visited by a spacecraft, it is composed of two, joined planetesimals. Arrokoth was photographed by the New Horizons spacecraft in December 2018 and January 2019.
Credits
Image
NASA, APL, SwRI, Roman Tkachenko