* Astronomy

Antonio de Ulloa y de la Torre-Girault (12 January 1716 - 3 July 1795) was a Spanish general, explorer, author, astronomer, colonial administrator and the first Spanish governor of Louisiana.
His name is also recalled as the meteorological term Ulloa's halo (also known as Bouguer's halo), which an observer may see infrequently in fog when sun breaks through.
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Platinum was referenced in European writings as early as 16th century, but it was not until Antonio de Ulloa published a report on a new metal of Colombian origin in 1748 that it became investigated by scientists.
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