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 ...

Astronomers have made a surprising discovery that challenges current theories of galaxy formation. A colossal disk-shaped ...

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

Andromeda XXXV, the faintest and smallest known satellite galaxy in the Andromeda system ... composed of a few billion stars, compared to the hundreds of billions of stars in large galaxies like the ...

Galaxies like the Milky Way boast more than spirals; they also have feathers, where clumps of new stars are born. Astronomers ...

The Milky Way is one of the biggest in the observable universe: Even if you traveled at the speed of light, it would take 100,000 years to go from one end of our home galaxy to the other.

Previous efforts to map the galaxy's dust were challenged by limited data, but the Gaia mission has provided a treasure trove ...

A supercluster is usually composed of hundreds or even thousands of clusters of galaxies, and these clusters are ...

The Big Wheel, discovered using the James Webb Space Telescope, formed just 2 billion years after the big bang - surprisingly ...

Swirling through the Milky Way's central zone, in the turbulent region surrounding the supermassive black hole at the core of ...