Some scientists believe that Andromeda experienced a major collision with another galaxy a few billion ... Hubble has provided a high-resolution 3D map of these small galaxies.

Astronomers at the University of Michigan have discovered a new satellite of the Andromeda Galaxy (M31), the Milky Way’s closest major galactic neighbor, and it has broken the record for the ...

Today, astronomers have measured the distance to the Andromeda Galaxy much more precisely; they find it to be about 2 1/2 million light years away. It is a majestic spiral-shaped galaxy ...

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...

"Every large galaxy has ... fine spatial resolution that it can pick apart the X-ray emission from M31* from three other X-ray sources that crowd around it in the core of Andromeda.

The Andromeda galaxy is surrounded by a constellation ... challenging existing models. High-resolution images from the Hubble Space Telescope show evidence of star cluster migration and merger ...