This telescope is sending back images of galaxies forming under a billion years after the Big Bang—way earlier than astronomers had previously expected.

A European space telescope launched to explore the dark universe has released a trove of new data on distant galaxies.

There could be many more satellite galaxies orbiting the Milky Way than previously thought or observed, according to astronomers.

A new PBS documentary explores the two decades of teamwork it took to get NASA's $10 billion deep space observatory ready for science. Just one day after the James Webb Space Telescope consortium ...

The debut images from a powerful telescope at Chile's Vera Rubin Observatory show distant galaxies and star-forming regions in spectacular detail.

Astronomers witnessed two galaxies engaged in an intense deep-space battle for the first time. Watch the “cosmic joust” in action.

New research suggests that the Milky Way should be surrounded by as many as 100 undetected tiny and faint "orphan" galaxy companions.

But the existence of what appear to be massive and mature galaxies during the universe's infancy defied expectations - too big and too soon. That left scientists scrambling for an explanation ...

Galaxies in their infancy, as captured by the James Webb Space Telescope. Their elongated appearance suggests a three-dimensional structure akin to that of a banana, according to a new study.

Observations by NASA's James Webb Space Telescope are upending the understanding of the early universe, indicating the presence of large and mature but remarkably compact galaxies teeming with ...