Cosmology

Depending on where we look, the universe is expanding at different rates. Now, scientists using the James Webb and Hubble space telescopes have confirmed that the observation is not down to a measurement error.

The James Webb Space Telescope zoomed in on galaxy GN-z11, which existed just 430 million years after the Big Bang, to reveal what may be some of the oldest stars in the universe.

Astronomers using the James Webb Space Telescope have detected the oldest "dead" galaxy ever observed, at just 700 million years after the Big Bang. The stalled-out relic defies explanation by our current knowledge of the early cosmos.

New observations with the James Webb Space Telescope reveal that dwarf galaxies in the early universe released enough collective radiation to change the cosmos forever.

The Hubble Space Telescope's latest image is a riot of orange, blue and violet — and a lesson in how plucky young stars clear their dusty neighborhoods.

Passing stars may have altered Earth's orbit, and its climate, many times throughout cosmic history. New research digs into what that means when it comes to understanding our planet's past.

A neutron star spotted by the James Webb Space Telescope stayed hidden for 37 years while lurking in the wreckage of a stellar explosion, Supernova 1987A.

Researchers recently mapped out the magnetic field of the gargantuan galaxy cluster "El Gordo." The resulting map of swirling magnetic field lines is the largest of its kind.

A new solution to Albert Einstein's theory of general relativity suggests hypothetical gravitational stars that look like black holes could be nested within one another.

The discovery or an ultra-tiny white dwarf could reveal how stars smaller than Jupiter are born.