"Rao passed away at his residence in the city's eastern suburb at around 3 a.m., after prolonged illness and age-related health issues," the Indian Space Research Organisation official told IANS.
Rao was the ISRO chairman for a decade from 1984 to 1994.
Remembering his achievements, Prime Minister Narendra Modi condoled his demise on Twitter and said, “Saddened by demise of renowned scientist, Professor UR Rao. His remarkable contribution to India's space programme will never be forgotten”.
Rao was awarded the Rao was awarded the Padma Bhushan by the Government of India in 1976. He was awarded Padma Vibhushan in 2017. He was inducted into the Satellite Hall of Fame, Washington on 19 March 2013 at a ceremony organised by the Society of Satellite Professionals International.