How do you distinguish a galaxy from a mere cluster of stars? That's easy, right? A galaxy is a large collection of millions or billions of stars, while a star cluster only has a thousand or so. Well, ...

The universe remains a big mystery for astronomers despite decades of research. Something new continues to come up in the world beyond that shakes all the core assertions of astronomy. In 2018, ...

Astronomers have discovered a collection of tiny galaxies located roughly 3 million light-years away that includes the smallest and faintest galaxy ever seen. This galaxy, designated Andromeda XXXV, ...

Astronomers have shed light on a decades-long debate about why galaxies rotate faster than expected, and whether this ...

Evidence of this quantum layer may be coming soon. Here’s what you’ll learn in this story: Physicists are still puzzling over ...

An unexpected monster black hole was found hiding inside one of the Milky Way's tiniest neighbors, rewriting what scientists ...

Small and unassuming, Segue 1 is a nearby dwarf galaxy containing only a handful of stars—too few to provide the gravity ...

An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a ...

Astronomers have unveiled a new catalog of massive galaxy clusters, revealing new insight on the evolution of the universe ...

They call it dark matter—an invisible substance thought to make up most of the universe’s mass, sculpting galaxies and clusters with its gravity. Now, researchers say they have spotted the smallest ...

WASHINGTON, May 23 (Reuters) - Astronomers have observed a galaxy dating to an earlier epoch in the universe's history that surprisingly is shaped much like our Milky Way - a spiral structure with a ...