Reimar Lüst (25 March 1923 – 31 March 2020) was a German astrophysicist. He was the president of the German Max Planck Society from 1972 to 1984 and the director general of the European Space Agency (ESA) from 1984 until 1990.[2] Lüst was a professor at New York, MIT and Caltech before he became the director general of the ESA.[3]