X-treme X-rays in an X-tra young system
Five years after this supermassive black hole started shining, its X-ray behavior is anything but ordinary.
Less than meets the eye: measuring the bias in galaxy cluster observations
Today’s authors come up with a new way to account for foreground and background galaxies in galaxy cluster measurements.
Six Supermassive Black Holes Wake Up from a Long Nap
Six galaxies show signs of a brand new active black hole in today’s bite.