If confirmed as a galaxy, a newly identified star system would be the faintest ever discovered—and could suggest there are others that remain to be found.

"This could completely shake up our understanding of how galaxies form," says Joseph Silk.

Scientists have discovered 14 transient objects in a galaxy they've dubbed the "Christmas Tree Galaxy Cluster."

The rate at which large cosmic structures grow is slower than Einstein's Theory of General Relativity predicts, report researchers.

Researchers have used a "gravitational lens" to reveal distant galaxies. The snapshot could help astronomers better understand dark matter.

A strand of lined-up galaxies in the early universe reveals clues—and questions—about the fundamental architecture of the universe.

Researchers have discovered hundreds of galaxies that existed when the universe was just 4% of its current age.

A "cosmic magnifying glass" has let astronomers discover complex organic molecules in a galaxy more than 12 billion light-years away.

A new finding moves astronomers one step closer to finding out when galaxies first appeared in the universe.

Researchers have captured a radio signal from the most distant galaxy so far, allowing a peek into the secrets of the early universe.