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James Melville Gilliss (September 6, 1811 – February 9, 1865) was an astronomer, United States naval officer and founder of the United States Naval Observatory. Gilliss was born on September 6, 1811 in Georgetown, District of Columbia. His parents were George Gilliss, a federal employee, and Mary (Melville) Gillis. In 1827 at the age of fifteen he joined the navy as a midshipman. He made several training cruises on the Delaware, the Java, and the Concord. In 1833 he passed his examinations and was advanced to passed midshipman.[1]Source: WikipediaThe US Naval Astronomical Expedition to the Southern Hemisphere took place during the years 1849-1852123. The expedition was conducted by the US Navy and aimed to conduct astronomical observations in the southern hemisphere. The findings of the expedition were published in three volumes between 1857 and 18594. The material was also published later by the US Naval Observatory in its Astronomical and Meteorological Observations5. The expedition was an important milestone in the history of astronomy and helped to advance our understanding of the southern skies.source: perplexity.ai
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