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 ...

Andromeda XXXV is only about 20,000 times more massive than our Sun—very small, even for a satellite galaxy. For comparison, ...

This is a wide-angle view ... The nearest galaxy of comparable mass to the Milky Way beyond Andromeda is M81, at nearly 12 million light-years. This bird's-eye view of Andromeda's satellite ...

Astronomers have discovered the smallest dwarf galaxy ever seen. It is a mystery how the satellite galaxy of Andromeda ...

But only one galaxy stands out as the most important nearby stellar island to our Milky Way—the magnificent Andromeda galaxy ... Essentially a wide-angle version of Hubble (with the same ...

What they found revealed a population of dwarf galaxies that are quite unlike the ones circling the Milky Way ... bird's eye view of the known dwarf galaxies orbiting the large Andromeda galaxy.

An curved arrow pointing right. In 3.75 billion years, Earth's Milky Way Galaxy will collide with the Andromeda Galaxy. Over the next several billion years, the two galaxies will rip each other ...

The nearby galaxy Andromeda is speeding towards us at 250,000 mph. It has a long way to travel - about 2.5 million light-years - but it's likely to crash into the Milky Way in about 4 billion years.

Situated approximately 2.5 million light-years from Earth, the Andromeda Galaxy is the closest major galaxy to the Milky Way, belonging to the Local Group cluster. It is a barred spiral galaxy ...

The nearest galaxy of comparable mass to the Milky Way beyond Andromeda is M81, at nearly 12 million light-years. This bird's-eye view of Andromeda's satellite system allows us to decipher what ...

This encounter, and the fact that Andromeda is as much as twice as massive as our Milky Way, could explain its plentiful and diverse dwarf galaxy population. This animation begins with a view of ...