Synopsis Meghnad Saha will always be remembered for his Theory of Thermal Ionization and its application in the interpretation of stellar spectra. His theory is considered to be one of the ten major discoveries in astrophysics. A brief glimpse into his dynamic career is provided in this compact biography.  He directed his keen intellect to the problems of national planning, river control and calendar reform; he founded the Institute of Nuclear Physics which now carries his name and reorganized the Indian Association for the Cultivation of Science.