Chatham County, Georgia Chatham County, Georgia Chatham County is a county in the U.S. state of Georgia, and is located on the state's Atlantic coast. The county seat and largest city is Savannah. One of the original counties of Georgia, Chatham County was created February 5, 1777, and is named after William Pitt, 1st Earl of Chatham. The U.S. Census Bureau's 2017 population estimate for Chatham County was 290,501 residents, making Chatham the most populous Georgia county outside the Atlanta metropolitan area. The official 2010 Census counted 265,128 residents in Chatham County. Chatham is the core county of the Savannah metropolitan area. According
Earl C. Slipher Slipher on the Moon is named after Earl and Vesto Slipher, as is asteroid 1766 Slipher, discovered September 7, 1962, by the Indiana Asteroid Program. Earl C. Slipher Earl Charles Slipher (; March 25, 1883 – August 7, 1964) was an American astronomer. He was the brother of astronomer Vesto Slipher. Slipher was born in Mulberry, Indiana. He first joined Lowell Observatory in 1908 and became a noted planetary astronomer, concentrating on Mars. He published "Photographic History of Mars (1905-1961)". In 1957, he appeared in the "Mars and Beyond" episode of "Disneyland" discussing the possibility of life on Mars. He