Astronomers named it 1I/’Oumuamua, borrowing a Hawaiian word that roughlytranslates to “messenger from afar arriving first” Two years later, in August 2019, amateur astronomer Gennadiy Borisov discovered the only other known interstellar interloper, now called 2I/Borisov, using a self-built telescope at the MARGO observatory in Nauchnij, Crimea.