Gregory Benford (born January 30, 1941) is an American science fiction author and astrophysicist who is on the faculty of the Department of Physics and Astronomy at the University of California, Irvine. As a science fiction author, Benford is perhaps best known for the Galactic Center Saga novels, beginning with In the Ocean of Night. He is also the author of the Nebula Award-winning classic book Timescape — a combination of hard science, bold speculation, and human drama.