Though tiny, this newfound satellite galaxy around M31 offers big lessons — and questions — about how galaxies evolve.

A Swarm of Dwarf Galaxies Buzz Around Our Milky Way's Twin Imagine the Milky Way and Andromeda as two massive aircraft ...

Located 2.5 million light-years away, the majestic Andromeda ... galaxy, like bees around a hive. These satellite galaxies represent a rambunctious galactic "ecosystem" that NASA's Hubble Space ...

This is a wide-angle view of the distribution of known satellite galaxies orbiting the large Andromeda galaxy (M31), located 2.5 ... galactic "ecosystem" that NASA's Hubble Space Telescope is ...

A major discovery on the outskirts of Andromeda is shaking up our understanding of galactic evolution. Astronomers have found the dimmest and smallest satellite galaxy yet—Andromeda XXXV—forcing them ...

The findings reveal unusual chemical signatures and offer new insights into the behavior of novas beyond the Milky Way.

NASA’s Spitzer Space Telescope has captured this stunning image of Andromeda Galaxy which is also known as M31. This image, captured by NASA's retired Spitzer Space Telescope, shows only dust which ...