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Carlos de Siguenza y Gongora

Carlos de Siguenza y Gongora, Mexican geographer and historian (Ciudad de Mexico 14 August 1645 – Ciudad de Mexico 22 Aug 1700)

Authored Libra astronomica y filosofica (1690) regarded as one of the most important works from Latin America in his day

Determinated the position of the comet of 1680 being his work highly praised for great astronomers of his day as Flamsteed and Cassini

Claimed that comets are wandering stars before Halley

Built an instrument for studying Sun eclipses 

Performed hydrological maps of Mexico Valley (1691)

Studied Aztec history and Toltec writing

Mapped Pensacola Bay and the mouth of Mississipi River (1693)