An illustration of two stellar-mass black holes merging in the accretion disk of an active galactic nucleus. (Shu-Rui Zhang) ...

For the first time ever, astronomers have captured two distinct X-ray views of an interstellar comet, providing an unprecedented glimpse into the interplay between a visitor from beyond our solar ...

Astronomers have discovered enormous circular radio features of unknown origin around some galaxies. Now, new observations of one dubbed the Cloverleaf suggest it was created by clashing groups of ...

The mystery of strangely blinking objects scattered throughout the Milky Way just deepened. Something 15,000 light-years away from the Sun isn't just slowly, methodically beaming out radio waves – ...

Mohan Ramanathan, associate project manager of the APS Upgrade, opens the shutter at the 27-ID beamline, letting in light for the first time since the facility paused operations in April 2023. After a ...

Astronomers have mapped out half the universe in X-ray light, using a space telescope called eROSITA. The new map, which contains almost a million X-ray sources, is the basis of dozens of new ...