© NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Only in the course of several million years did Arrokoth, also known by its nickname Ultima Thule, acquire its bizarre, pancake-flat shape. The trans-Neptunian object Arrokoth, also known as Ultima Thule, which NASA’s space probe New Horizons passed on New Year’s Day 2019, may have changed its shape significantly in the first 100 million years since its formation...
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