In a first, astronomers say they’ve detected a long ribbon of stars outside the Milky Way. The globular cluster stellar stream could reveal clues about dark matter.

NASA’s Roman Space Telescope launches Aug. 30 aboard Falcon Heavy to map billions of galaxies, hunt exoplanets and ...

Using the James Webb Space Telescope and NASA's Chandra X-ray space telescope, scientists have observed the most distant and thus earliest galaxy cluster ever seen coming together. The infant cluster, ...

Astronomers have identified three actively accreting black holes inside a single galaxy more than 12.5 billion light-years away, providing a rare glimpse of black hole growth when the universe was ...

Recently, the Hubble Space Telescope captured an image of a dwarf galaxy in the constellation Ursa Major. Markarian 178 (Mrk 178) is one of over 1500 "Markarian galaxies," a class defined by their ...

The latest image from the world's largest camera captures an overwhelming number of galaxies on a 3200MP car-sized camera ...

Astronomers found that star clusters do not always form the same balance of small and large stars, challenging a long-standing assumption used to measure galaxies. Gaia data show that a key dividing ...

A surprisingly mature spiral galaxy named Alaknanda has been spotted just 1.5 billion years after the Big Bang—far earlier than astronomers believed such well-structured galaxies could form. With ...

This NASA Hubble Space Telescope image reveals an enigmatic galaxy with a bright center and a face that hints at spiral structure, yet it holds no obvious spiral arms. Reddish-brown clumps and ...

In the vast tapestry of the universe, most galaxies shine brightly across cosmic time and space. Yet a rare class of galaxies remains nearly invisible—low-surface-brightness galaxies dominated by dark ...

Astronomers used galaxy cluster MACS J0416 (background), as a magnifying glass to view the extremely faint galaxy LAP1-B (inset), which is visualized here based on ...

Astronomers have produced the most detailed map yet of dark matter, revealing the invisible framework that shaped the Universe long before stars and galaxies formed. Using powerful new observations ...