Ludwig Franz Benedict Biermann (born March 13, 1907 in Hamm – January 12, 1986 in München) was a German astronomer, obtaining his Ph.D. from Göttingen University in 1932.
He made important contributions to astrophysics and plasma physics, discovering the Biermann battery. He predicted the existence of the solar wind which in 1947 he dubbed "solar corpuscular radiation".
He was a visiting scholar at the Institute for Advanced Study in the fall of 1961. He won the Bruce Medal in 1967 and the Gold Medal of the Royal Astronomical Society in 1974.
Asteroid 73640 Biermann is named in his honor.