Annibale Riccò

Annibale Riccò
Born September 14, 1844
Milan, Italy
Died September 23, 1919(1919-09-23) (aged 75)
Rome, Italy
Residence Italy
Citizenship Italian
Institutions University of Catania
Alma mater University of Modena
Notable awards Janssen Medal (1906)

Annibale Riccò (September 14, 1844 – September 23, 1919) was an Italian astronomer.

He was born in Milan, Italy. In 1868 he was awarded a bachelor's degree from the Università di Modena, then an engineering degree from the Politecnico di Milano. Between 1868 and 1877 he worked as an assistant at the Modena Observatory, teaching mathematics and physics at the Università di Modena. He taught at Naples and then Palermo, where he also worked at the observatory.

In 1890 he was named to the chair of astrophysics at the Università di Catania, and became director of the observatory on Mount Etna as well as the first director of the Catania Observatory. Between 1898 and 1900 he was named chancellor of the University.

During his career he performed research into sunspots, and he participated in four solar eclipse expeditions, leading the expeditions in 1905 and 1914. He was president of the Società degli Spettroscopisti Italiani and the Gioenia di Scienze Naturali di Catania. He also served as vice president of the International Astronomical Union. He was elected President of the volcanology section of the International Union of Geodesy and Geophysics (IUGG) for the period 1919–1922.

He discovered Ricco's Law, an important principle of vision science. The crater Ricco on the Moon is named after him, as is the asteroid 18462 Ricco.

He died in Rome, Italy.

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