Ripples in the fabric of space-time called gravitational waves may be the key to solving the Hubble tension — one of the biggest nagging problems in physics.

A newly detected X-ray transient may reveal the first direct evidence of an intermediate-mass black hole consuming a white dwarf. A newly observed cosmic outburst is giving astronomers a rare glimpse ...

Black holes are well known for swallowing everything around them, which is probably why they get talked about so often. On the flip side, white holes are their mysterious opposite. These theoretical ...