Gregory Benford

Great Sky River is a Nebula Award nominated 1987 novel written by author Gregory Benford as a part of his Galactic Center Saga series of books.

Impending personal tragedy is dimming the brilliant light of Dr. Benjamin Knowlton's world. On the threshold of their greatest achievement, the renowned astrophysicist's beloved wife and partner -- ex-astronaut-turned astronomer -- is dying. But something looms alarningly on the far edge of the solar system: at once a …