Our neighboring Andromeda Galaxy (Messier 31, or M31) appears to sport a lopsided arrangement of satellite galaxies that defy scientific models, stumping astronomers who are also trying to figure out ...

Astronomers taking a close look at our nearest neighbor galaxy have made a highly unusual and model-challenging discovery; ...

A recent study published in Nature Astronomy has revealed that the dwarf galaxies orbiting around Andromeda, our neighboring ...

Every big galaxy has a supermassive black hole at its center, but scientists are still trying to fully understand how these ...

Along with a number of neighbouring galaxies — including our closest galactic neighbour, the Andromeda Galaxy — it forms what ...

By the 1920's, M31 was clearly understood to be a grouping ... it became clear that the Milky Way was only one star system (or galaxy) among myriad others. This was the birth of our modern ...

It is a panoramic view of the neighboring Andromeda galaxy, located 2.5 million light-years away. It took over 10 years to make this vast and colorful portrait of the galaxy, requiring over 600 ...

The large-scale cloud formations visible in the foreground belong to our own Milky Way galaxy, as do the several distinct colorful stars which surround the diffuse spiral shape of M31. While its ...

Cosmological simulations say that such an alignment should not happen, with a probability of less than 0.3%. Our neighboring Andromeda Galaxy (Messier 31, or M31) appears to sport a lopsided ...