S Chandrasekhar - A very good teacher , he considered teaching is a life time mission.

Chandrasekhar Subramanyan’s most famous discovery was the astrophysical Chandrasekhar limit. The limit describes the maximum mass (~1.44 solar masses) of a white dwarf star, or equivalently, the minimum mass for which a star will ultimately collapse into a neutron star or black hole following a supernova. The limit was first calculated by Chandrasekhar while on a ship from India to Cambridge, England. The Chandrasekhar Limit led to the determination of how long a star of particular mass will shine. In 1983, Chandrasekhar Subramanyan got the Nobel Price for this discovery.

Two of Chandrasekhar's students in 1947 were the doctoral candidates Tsung-Dao Lee and Chen Ning Yang in Particle Physics research. Even though Chandrasekhar Subramanyan maintained his office at the Yerkes Observatory in Lake Geneva, Wisconsin, he would regularly drive the one hundred miles to Chicago to guide and teach Lee and Yang and others many a times in difficult weather conditions. In 1957, these two of his students won the Nobel Prize in Physics for their work in particle physics research. This also brings out Chandrasekhar Subramanyan’s commitment to science and there by to his students. Science indeed is a life time mission for Chandrasekhar. It is this characteristic which makes youth to become passionate towards science.