A dark galaxy. AC G185.0-11.5 is part of the larger AC-I Complex, which is what astronomers call a high-velocity cloud (HVC). These are clumps of hydrogen moving up to several hundred mph faster ...

Galaxies are incredibly complex systems that we are still struggling to understand,” observed Enrico Congiu of the European Southern Observatory, conveying the wonder that met release of the sharpest ...

At a distance of around 11.4 million years away from Earth, the ultra-faint galaxies are the first to be found orbiting a Milky Way-like galaxy outside of our galaxy's cosmic backyard, known by ...

Researchers discovered the first ultra-faint dwarf galaxies to be found around a spiral galaxy with the mass of the Milky Way that’s outside of the Local Group, the clustering of galaxies that ...

It exists with over 50 other galaxies called the Local Group, which also includes Andromeda. In orbit around the Milky Way are a number of dwarf galaxies, ...

The James Webb Space Telescope (JWST) has spotted the smallest galaxy outside our local universe by using the heaviest known cluster of galaxies, called El Gordo, as a giant lens. El Gordo was ...

A collision between our Milky Way galaxy and its largest neighbor, the Andromeda galaxy, predicted to occur in about 4.5 billion years, has been anticipated by astronomers since 1912. But new ...

Our far-future descendants will find themselves pushed away from what they will surely call the Great Repeller, with the merged mega-galaxy that was once the Local Group their only refuge in an ...

The computer model also makes use of new mass estimates for other galaxies within the Local Group—a galactic group that hosts the Milky Way and Andromeda, among others.

A collision between our Milky Way galaxy and its largest neighbor, the Andromeda galaxy, predicted to occur in about 4.5 billion years, has been anticipated by astronomers since 1912. But new ...