An inexplicably hot, fast-growing cluster of galaxies in the early universe has scientists questioning theories of galactic ...

Nearly all stars are found inside or around galaxies, but there are ways for stars to escape into intergalactic space.

Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe.

JWST recently caught three of the universe’s earliest galaxies in the act of pulling themselves together from a giant, dark cloud of hydrogen gas. The three dim spots of red light in a recent batch of ...

Hubble has revealed a strange cosmic object called Cloud-9, a dark matter–dominated cloud with no stars at all. Scientists ...

While nearly all massive galaxies possess central black holes, the presence of such black holes in dwarf galaxies remains an open question, with previous estimates identifying them in only 0.5% of ...

A wobbling jet from a giant, voracious black hole is suppressing star formation in a distant galaxy—and astronomers have ...

Covering a huge area of the sky in three mosaics, the data release also includes numerous galaxy clusters, active galactic nuclei and transient phenomena, as well as the first classification survey of ...

Astronomers have captured the most detailed look yet at faraway galaxies at the peak of their youth, an active time when the adolescent galaxies were fervently producing new stars.

Using data from the James Webb Space Telescope, astronomers have discovered dormant galaxies with a wide range of masses in the first billion years after the Big Bang, moving one step closer to ...

Head-scratching observations of distant galaxies are challenging cosmologists’ dominant ideas about the universe, potentially leading to the implication that the strange substance called dark matter ...