  This is a concise review, addressed to undergraduate students, of S.
Chandrasekhar's oeuvre in astrophysics, ranging from his early studies on white
dwarfs using relativistic quantum statistics to topics as diverse as dynamical
friction, negative hydrogen ion, fluid dynamical instabilities, black holes and
gravitational waves. The exposition is based on simple physical explanations in
the context of observational astronomy. Black holes and their role as central
engines of active, compact, high energy sources have been discussed.
