New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

Brian Cox explains the most extreme, dangerous region in the cosmos, where gravity, radiation, and physics push the limits of ...

Cosmic dawn galaxies seen by JWST reveal hidden clues about dark matter and keep rival theories about its true nature alive.

If you feel a thrill every time we discover something new about the cosmos, then November 25th may have been a noteworthy day ...

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...

Astronomers are a step closer to cracking one of the secrets of dark energy—the mysterious force believed to be causing the universe's accelerated expansion.

Record-breaking ultrafast outflow (UFO) winds from a supermassive black hole flung matter across the universe close to the speed of light.

A faint, ancient flash of light detected by the James Webb Space Telescope (JWST) has broken the record for the most distant ...

For centuries, Europeans thought that eternal daylight saturated the cosmos. The shift to a dark universe has had a profound ...

A never-before-seen blast from a supermassive black hole was spotted by two sophisticated X-ray space telescopes. This giant ...

Leading X-ray space telescopes XMM-Newton and XRISM have spotted a never-seen-before blast from a supermassive black hole. In ...

Astronomers have sighted the oldest known stellar explosion, dating back to when the universe was less than a billion years ...