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.

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 ...