The first black hole that astronomers observed "turning off" just turned back on, releasing jets of hot gas into the cosmos.

A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...

Active galactic nuclei are supermassive black holes at the center of certain galaxies. As matter falls into these black holes ...

Astronomers have captured the most detailed infrared images yet of an active galactic nucleus (AGN), using the Large ...

"We think every dense, dusty region that we see, and most of the ones we don't see, look like this on the inside — we just ...

The galaxy, located in the constellation Leo, is about the same size as a star cluster within the Milky Way and is about the ...

NASA astronaut Don Pettit has snapped a striking shot of the super-bright comet racing past our planet for the first time in ...

Pandora, NASA's newest exoplanet mission, is one step closer to launch with the completion of the spacecraft bus, which ...

"The question 'Are we alone?' is one of the most significant questions, not just in the history of science, but in the ...

In December 2022, less than six months after commencing science operations, NASA’s James Webb Space Telescope revealed ...

On Monday night you may have a chance to witness the moon obscuring the Red Planet at its brightest, as well as a comet’s ...