Eater

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 scientific find of unparalleled importance that could ensure the Knowltons' immortality, and a potential earth-shattering cataclysm that dwarfs their private one. For Benjamin and Channing have discovered "Eater," an eons-old black hole anomaly that devours stars and worlds. Yet its most awesome and devasting secrets are still to be revealed...and feared.

Synopsis from Open Library.