Mexican astronomer, born 13 March 1913 in Mexico D. F. and died on April 26, 1988, was a precursor of Mexican astronomy and discoverer of galaxies that bear his name (Herbig-Haro objects).
During his childhood, Mexico was going through turbulent revolutionary episodes, which decisively influenced him in that you enter in the Faculty of philosophy and letters in his hometown, where he/she graduated in law. A friend of his, Professor l. e. Erro, introduced him in the study of astronomy, and Haro decided to leave their doctoral studies in law to become Assistant to his friend. Between 1943 and 1947 he/she studied astronomy and entered in the Case of the University of Chicago Observatory, and at the McDonald Observatory of Texas as a collaborator. Together with North American astronomer G. Herbig discovered galaxies that bear his name and a type of very bright nebulae known as Herbig-Haro objects.
After returning to his homeland, he/she assumed the leadership of the Astronomical Observatory of Tacubaya, the Institute of astronomy and the National Astronomical Observatory of Tonantzintla. He/She projected the Observatory of San Pedro Mártir in Baja California, which currently bears his name. In 1951 he/she founded the Bulletin of the observatories of Tonantzintla and Tacubaya, which published until 1983. Between 1961 and 1967 he/she was Vice-President of the International Astronomical Union.
His numerous discoveries, in addition to those already mentioned, include Haro-Chavira Comet, several supernovae and type flare star. It investigated the spectroscopic emission lines of many galaxies and other stellar objects and developed a theory on the formation and stellar evolution.