July 5 – NASA’s Juno spacecraft enters orbit around Jupiter and begins a 20-month survey of the planet.- Chester A. Arthur (Wikipedia)
Chester Alan Arthur (October 5, 1829[b] – November 18, 1886) was an American politician who served as the 21st president of the United States from 1881 to 1885. He was a Republican lawyer from New York who briefly served as the 20th vice president under President James A. Garfield. Arthur assumed the presidency after Garfield’s death on September 19, 1881, and served the remainder of his term until March 4, 1885.