Otto Heckmann

Otto Hermann Leopold Heckmann (June 23, 1901 – May 13, 1983) was a German mathematician and astronomer, director of the Hamburg Observatory from 1941 to 1962, after which he became the first director of the European Southern Observatory. He actively contributed to the creation of the third issue of the ''Astronomische Gesellschaft Katalog''. He also contributed to cosmology based on the fundamentals of general relativity, and in 1942 wrote the book ''Theorien der Kosmologie''. Provided by Wikipedia