Credit: NASA, ESA, and M. Chiaberge (STScI and JHU)
This image, taken by NASA's Hubble Space Telescope, reveals an unusual
sight: a runaway quasar fleeing from its galaxy's central hub. A quasar is
the visible, energetic signature of a black hole. Black holes cannot be observed directly, but they are the energy source at the heart of quasars -- intense, compact gushers of radiation that can outshine an entire galaxy.
The green dotted line marks the visible periphery of the galaxy. The
quasar, named 3C 186, appears as a bright star just off-center. The quasar and its host galaxy reside 8 billion light-years from Earth. Researchers estimate that it took the equivalent energy of 100 million supernovas exploding simultaneously to jettison the black hole. The most
plausible explanation for this propulsive energy is that the monster
object was given a kick by gravitational waves unleashed by the merger of two hefty black holes at the center of the host galaxy.
The Hubble image combines visible and near-infrared light taken by the
Wide Field Camera 3.