Early galaxies may be up to four times more massive than thought due to a hidden population of small stars, challenging galaxy formation theories.
The universe's expansion can cause distant galaxies to recede faster than light, a phenomenon that does not violate Einstein's theory of relativity because it involves the stretching of space itself, not the movement of objects through space.
Astronomers have detected a large reservoir of cold molecular gas in the early universe galaxy REBELS-25, providing insight into rapid star formation and galaxy growth.
New research indicates that supermassive black holes can render exoplanets uninhabitable by stripping away atmospheres and depleting ozone, even at vast distances.
Astronomers have captured the clearest direct image of a cosmic web filament, revealing a three-million-light-year strand connecting two ancient galaxies.
New research on ultra-faint dwarf galaxies suggests they hold crucial information about the early universe's conditions and star formation.