The Andromeda Galaxy (M31, NGC 224) is a truly stunning and colossal presence in our universe, located 2.5 million light years away in the Andromeda constellation. This supergiant spiral galaxy, often ...

In the local group of galaxies that also includes the Andromeda Nebula and our Milky Way, there are about 100 billion stars. According to astronomers' calculations, there should be many more.

If you want to pinpoint your place in the universe, start with your cosmic address. You live on Earth->Solar System->Milky ...

The Local Group is a collection ofabout 40 galaxies, of which the MilkyWay and Andromeda are the dominant members. The rest of the galaxies are mostly small satellitesknown as "dwarfgalaxies" that ...

Pericentric passage-driven star formation in satellite galaxies and their hosts: CLUES from Local Group simulations. Monthly Notices of the Royal Astronomical Society , 2021; DOI: 10.1093/mnras ...

A recent sky survey has turned up eight new members in our Local Group of galaxies, including a new class of ultra-faint "hobbit" galaxies and what might be the smallest galaxy ever discovered.

Astronomers know that the Milky Way is parked within the Local Group of galaxies, an interstellar expanse extending 3 million light years across. But we know very little about the area just ...

Our Local Group of galaxies lies on a side street 50 million light-years from the great intersection of two dark matter filaments that created the magnificent Virgo Cluster of about 2,000 galaxies.

The Local Group of galaxies—a collection that includes the Milky Way, Andromeda and a few dozen smaller galactic companions—moves at about 600 kilometers per second with respect to the ...

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 ...

Superclusters are the largest and most massive known structures in the Universe. They consist of clusters of galaxies and walls that span up to 200 million light-years across the sky.

However, our galaxy and group are gravitationally bound. In the contest between local gravity and cosmic expansion, gravity is the winner on scales up to the Local Group. But on the scale of ...