This gorgeous man is Subrahmanyan Chandrasekhar. He was an astrophysicist, born in what is now present-day Pakistan in 1910.
The Chandrasekhar limit is named after him, and it describes the maximum mass of a white dwarf star. He estimated this limit when he was just 19, on a voyage from British India to England while running calculations of observations done by prominent astronomers at the time. His findings were pretty much ignored by the British scientific community because that limit implied the natural formation of black holes and a prominent astrophysicist didn’t want to accept that black holes could exist - this pompous idiot derided Chandra’s findings and, thus, kept other astrophysicists from publicly declaring their support for his research on stellar evolution.
He was a well-liked professor of Theoretical Astrophysics at the University of Chicago later in his life and was eventually awarded the Nobel Prize in Physics in 1983 for his work on the evolution of stars.
He died in 1995 at the age of 84 - it’s undisputed that he is one of the great minds of theoretical astrophysics, but I think we can also agree that in his earlier years he was also damn fine.
Oh, and NASA’s X-ray observatory is named the Chandra X-ray Observatory in honor of him, so that’s not like a big deal or anything either.
(Photo credit: http://chandra.harvard.edu/graphics/resources/illustrations/chandraYoungPose-72.jpg)