Hafiz Saleh Muhammad Alladin (born 3 March 1931 in Hyderabad, India; died 20 March 2011 in Amritsar) was an Indian Ahmadi Muslim astronomer.
Alladin received in 1963 a PhD at the University of Chicago.
He was among the famous 100 Astronomers of the world and served as the educational advisor to former President APJ Abdul Kalam of India.
He wrote many books, penned hundreds of articles and published more than 50 research papers.
He then went as a professor at the Osmania University in Hyderabad, where he was Director of the Center of Advanced Study in Astronomy.Alladin was a prominent member of many scientific societies such as the International Astronomical Union, Astronomical Society of India, Plasma Science Society of India, the Indian Association for General Relativity and Gravitation and the Indian Association of Physics Teachers.