T he Perseus cluster is enormous. It has a mass equivalent to 600 trillion Suns, and it looks like it has not stopped growing. New evidence suggests that it is undergoing a merging process with ...

The detection of dark matter, an elusive form of matter believed to account for most of the universe's mass, remains a ...

To mark the 35th anniversary of the Hubble Space Telescope, Space.com looks at some of the most scientifically significant images that have emerged from the observatory's lens.

Scientists may have finally found the universe’s missing matter - hidden in invisible hydrogen gas far beyond galaxies.

NSF–DOE Vera C. Rubin Observatory is gearing up to illuminate the universe’s darkest secrets with groundbreaking new ...

"All the odd shapes and swirling gas observed in the Perseus cluster now make sense within the context of a major merger." ...

A bold new theory suggests the universe didn’t begin with a single Big Bang, but instead unfolds through a series of ...

Astronomers have discovered a rare kind of galaxy that seems to be missing one of the universe’s most important ingredients: ...

These series of step-like bursts happen so rapidly that they are difficult to observe as these singularities wink in and out ...

"All the odd shapes and swirling gas observed in the Perseus cluster now make sense," said astronomer James Lee.

Using data from space telescopes and other instruments, astronomers, cosmologists, and astrophysicists are able to deduce and ...