The mysterious object was the first visitor from interstellar space observed passing through the solar system. Astronomers named it 1I/'Oumuamua, borrowing a Hawaiian word that roughly translates to messenger from afar arriving first.
Researchers estimate that within the orbit of Neptune alone, there could be around 10,000 Oumuamua-size interstellar objects. The discovery of Borisov indicates a higher prevalence of such interlopers.
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