Astronaut and University of Tennessee graduate Barry "Butch" Wilmore has announced his retirement from NASA. The news comes months after he and fellow Astronaut Suni Williams returned to Earth from a nine-month stay aboard the International Space Station that made world news.

Four months after NASA astronauts Butch Wilmore and Suni Williams returned from their eight-day turned nine-month mission in space, Butch has retired.

The astronaut is stepping away from NASA shortly after returning from a troubled test flight that left him aboard the ISS months longer than expected.