Galaxies are clouds of stars that range in both size and composition. Some contain hundreds of millions of stars while the largest galaxies can contain trillions of stars. And while it’s not entirely ...

Using the James Webb Space Telescope (JWST), scientists found that many galaxies started as thick discs before forming the thin discs we see now. This discovery helps answer a long-standing mystery ...

T he first time I heard about galaxies without dark matter, I was sitting in my very first graduate class at the University of São Paulo. It was 2018, and the discovery had just ...

The universe may be a little darker after a recent discovery has shown that there could be fewer galaxies populating it. A previous measurement by Hubble Space Telescope suggested there were 2 ...

Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe. Their progenitors, protoclusters, show these galaxies in their infancy, ...

Rotating razor-thin galaxy string found 140 million light-years away shows many galaxies spinning with their filament, hinting that large structures shape galaxy rotation. Cosmic filaments are the ...