DENVER — You've seen the first close-up of a black hole. Now, get ready to see the faint wisps of matter surrounding the object. The international team responsible for the first-ever image of a black hole's

It's one of the first times such a stellar phenomenon has been observed.

Some 12.4 billion light-years from Earth, a monster galaxy can be seen forming stars 1,000 times faster than the Milky Way does. It's less of a mess than researchers expected — but its frenetic pace can't

Two new studies shed light on the cosmic dust that's likely responsible for the weird and dramatic dimming of "Tabby's star."

Astronomers have captured a striking new image of the Tarantula Nebula that highlights its abundance of stars and stunning luminosity.

Cascades of black hole collisions could lead to the formation of more-massive black holes.

The universe is filled with faintly glowing infrared light, and for decades, astronomers have been trying to figure out why.

The bizarre long-term dimming of Tabby's star — also known as Boyajian's star, or, more formally, KIC 8462852 — is likely caused by orbiting dust, not a "megastructure" built by advanced aliens,

Gravitational-wave hunters have a new tool in their arsenal. The Virgo gravitational-wave detector in Italy has made its first detection of ripples in the fabric of the universe, the collaboration announced

Two galaxies are merging in the Arp 299 system. Astronomers have discovered 14 ”ultra-luminous X-ray sources," though Chandra observations of the system.