Earth is orbited by thousands of artificial satellites, but only one large, natural Moon. Eight years ago, researchers at the University of Hawaiʻi Institute for Astronomy (IfA) predicted that there must be a population of small, natural ‘minimoons’ that temporarily orbit Earth. On November 22, a team of 23 researchers from 14 academic institutions announced a study on the second minimoon ever discovered, dubbed 2020 CD3.
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