Webb’s new images of the Bullet Cluster reveal the most detailed dark matter map yet, shedding light on cosmic collisions and ...

This stunning image reveals a distant galaxy cluster teeming with energy: galaxies shine in visible light (white), ghostly red clouds unveil a newly discovered radio mini-halo—the most distant ever ...

Despite decades of searching, scientists still haven’t found the elusive substance that holds galaxies together: dark matter.

Despite decades of research, scientists have yet to detect dark matter — the invisible substance that holds galaxies together and makes up 27% of the universe.

Early Spiral Galaxy Captured for the First Time Using Gravitational Lenses . For the first time ever, scientists have ...

Everything in space—from Earth and the sun to black holes—accounts for just 15% of all matter in the universe. The rest of ...

The Vera C. Rubin Observatory, which houses a telescope with the largest digital camera ever built, has revealed its first images.

Astronomers have taken an unprecedentedly detailed look at the tendrils and filaments that wrap around supermassive black hole-dominated galaxies of Abell 2255.

A brand-new, cutting-edge telescope called the Vera C. Rubin Observatory is about to release its first images to the world, and the public can watch in real time. On June 23 the observatory will ...

Astronomers have revealed a nearby spiral galaxy in all its brilliant glory, shining in thousands of colors. The dazzling panoramic shot released Wednesday of the Sculptor galaxy by a telescope in ...

Using NASA's Chandra X-ray space telescope, astronomers have discovered that an entire galaxy cluster is wrapped in a 20 million light-year-wide envelope of charged particles.