Antonio de Ulloa y de la Torre-Giral ( 12 January 1716 -- 3 July 1795 ) was a Spanish general , explorer , author , astronomer , colonial administrator and the first Spanish governor of Louisiana .
Antonio de Ulloa ( 12 January 1716 -- 3 July 1795 ) was a Spanish general , explorer , author , astronomer , colonial administrator and the first Spanish governor of Louisiana .