A copper plate inscription at Mallikarjuna Swamy Temple reveals India’s first mention of Halley’s Comet. The inscription dates back to June 28, 1456 CE. It documents a land grant by Vijayanagara king Mallikarjuna. Historians identify a celestial object in the inscription as Halley’s Comet. This discovery highlights India’s rich astronomical knowledge. The inscription suggests medieval scholars tracked cometary cycles closely.