Hatzes (born May 24, 1957) is an American astronomer.
He is a professor at the Friedrich Schiller University of Jena and director of the Karl Schwarzschild Observatory (Thuringian State Observatory).
Hatzes is a pioneer in the search of extrasolar planets and is working on the COROT space mission.
His achievements have included discovering the extrasolar planets Pollux b, Epsilon Eridani b and HD 13189 companion.