black holes

Stephen Hawking onstage discussing theories on the origin of the universe in a talk in Berkeley, California, 2007.
Culture
Physicist Stephen Hawking, who unlocked the secrets of space and time, has died at 76
the Hubble Space Telescope Image of a Frontier Fields galaxy cluster, Abell 2744 (one of the deepest images taken of any cluster in the universe).   Credit: ESA/Hubble, NASA, HST Frontier Fields and J. Lotz, M. Mountain, A. Koekemoer, and the HFF Team (ST
Science
These are some of the darkest mysteries of our universe
Artist's drawing of a black hole named Cygnus X-1
Science
A high-powered telescope peers into the dark heart of a black hole
UC Berkeley Astrophysicist on Black Hole Discovery