MeerKAT Detects Radio Signal From Interstellar Comet 3I/ATLAS — OH Lines Confirm Natural Origin (Nov. 13, 2025)
South Africa’s MeerKAT radio array detected hydroxyl absorption lines at 1665 and 1667 MHz from interstellar comet 3I/ATLAS on Oct. 24, 2025, confirming water outgassing as it neared the Sun. The signal matches classic comet chemistry and counters recent speculation about artificial origins. Earlier September attempts saw no signal. The finding marks the first radio confirmation for 3I/ATLAS.