Astronomers studying the Milky Way's oldest stars have estimated that the Universe is about 13.6 billion years old.

It's a new window into the first star explosions.

The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments. If some of them are about ...

Researchers from the University of Bologna and the Leibniz Institute for Astrophysics Potsdam (AIP) along with other institutes have proposed a new way to address the Hubble tension by comparing ...

A sweeping new ALMA image has peeled back the veil on the Milky Way’s core, exposing a dense network of cold gas filaments near the central black hole. Stretching across 650 light-years, the survey ...

"Cosmic archaeologists" have discovered an iron-deficient second-generation star, which provides evidence of how ancient ...

Super galaxy clusters are among the largest structures in the universe. Now, a particularly large one has been measured, ...

The peculiar chemical signature is quite similar to the signature that astronomers have noted in some of the most ancient ...

A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American Astronomical Society in January 1925, a paper read by one of his ...

New supercomputer simulations suggest the Milky Way could be surrounded by dozens more faint, undetected satellite galaxies—up to 100 more than we currently know. These elusive "orphan" galaxies have ...

A dim star orbiting the Milky Way is drawing attention for its almost pristine composition. Named PicII-503, it contains ...

It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported Monday that the probability of the two spiral galaxies colliding is ...