Astronomers make the first direct observations of a "missing link" between two stages of neutron star evolution. Continue reading →
It's a case of cosmic whodunit: What happened to all the external stars in M60-UCD1, an ultra-compact dwarf galaxy? They were stolen. Continue reading →
An elderly neutron star appears to be hiding a surprisingly powerful magnetic field. And it's probably not the only one of its kind! Continue reading →
Ever tried to comprehend the magnitude of the cosmos and some of its most energetic processes? If so, the X-ray halo around the merging galaxies known as NGC 6240 may just blow your mind. Continue reading →
X-ray evidence for the most massive black holes in our universe has been discovered -- but they're not supermassive, they're ULTRAmassive.
Some relationships are doomed from the beginning, and the same can be said of some planetary systems.
Our typically mild-mannered black hole recently flared up, and NASA's new X-ray space telescope saw all the action.
The Tarantula Nebula is growing, but astronomers can't agree why.