Unlike active galaxies that constantly pull in surrounding material, these black holes lie dormant, waking briefly to feast ...

After NASA’s Fermi Gamma-ray Space Telescope and Swift Observatory spotted the BOAT, , an international team of astronomers ...

There's so much more to Andromeda than its eponymous galaxy. Here's a list of other targets to observe in the Princess.

An infinity symbol–shaped galaxy hosts an active supermassive black hole. The growing giant may have come from the aftermath of a galactic smashup.

Many astronomers are growing increasingly concerned that these outdoor lighting from roads, buildings and elsewhere could ...

“The gas spans the entire width of the system and was likely shocked and compressed at the collision site,” they and their ...

An international team has discovered a gigantic filament of hot gas connecting two pairs of galaxy clusters over a distance ...

What could we choose as the seven most remarkable celestial objects visible either with our eyes or with a small telescope?

If you scroll through social media lately, you’ve probably noticed something twinkling in the background of countless posts: ...

Supermassive black holes, sitting at the core of galaxies, are known to be active and emit a lot of X-rays. Finding one way ...

Using the Hubble Space Telescope (HST), astronomers have observed a nearby ultra-diffuse galaxy designated F8D1. The new ...

Astronomers may have found a rare intermediate-mass black hole outside galaxy NGC 6099—offering clues about how bigger black holes form.