John Herschel Glenn Jr. (July 18, 1921 – December 8, 2016) was a former astronaut and United States Senator. He is best known for being the first American to orbit the Earth as an astronaut for NASA. After his career as an astronaut, he went into politics and served as a Senator from his home state of Ohio from 1974-1999. In 1998, he made his second spaceflight at the age of 77 years. He is the oldest man ever in outer space. Following the death of senator Edward Brooke in January 2015, he was the oldest living former U.S. senator until his death in December 2016.