Researchers working with data from the South Pole Telescope have released a major catalog of galaxy clusters, giving ...

The cluster is very bright at X-ray wavelengths and is one of the most extensively studied galaxy clusters at X-ray and radio ...

In 2023, astronomers spotted the longest stellar river across a chaotic galaxy cluster ...

A composite of galaxy cluster known as MACS0416 created using James Webb Space Telescope and Hubble Space Telescope imagery.

For decades, astronomers have searched for the birthplace of globular clusters, the dense spherical collections of stars that ...

New cosmic census based on five years of data opens a powerful new window into the large-scale structure of the universe ...

For decades, astronomers have pictured galaxies and their central black holes growing together. In the familiar story, a ...

NASA's Hubble Space Telescope has captured a spectacular red, white, and blue view of one of the Milky Way's oldest star clusters to celebrate the nation's 250th anniversary. Hidden within the ancient ...

Stars look like sparklers in the latest image from NASA's Hubble Space Telescope, which was released on America's 250th ...

Quasars — the brightest objects in the universe — are powered by supermassive black holes at the heart of early galaxies.

The Bullet Cluster of galaxies might only have half as much dark matter than scientists thought, or perhaps even none at all, ...

More than 500,000 stars glow in shades of red, white, and blue in a spectacular new image captured by NASA's Hubble Space ...