SWEET BRIAR, Va. (AP) — Sweet Briar College says former NASA astronaut Kathryn Thornton will deliver the keynote address at the college's graduation in May.

The all-female liberal arts college will hold its 108th commencement on May 13, 2017.

Thornton made four space flights between 1989 and 1995. A physicist, she holds a master's and doctorate degree from the University of Virginia and a bachelor's degree from Auburn University. She is now director of the aerospace engineering program and a professor in the mechanical and aerospace engineering department at the University of Virginia.