Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

The Hubble Space Telescope completes a high-resolution portrait of our galaxy's gorgeous neighbor, which will help scientists better understand our Milky Way.

The full image includes some 2.5 billion pixels compiled from observations spanning more than 1,000 orbits around Earth ...

The most detailed panorama of the entire Andromeda galaxy is packed with science that could revolutionize our understanding of how spiral galaxies across the universe form and evolve.

Astronomers have released the most comprehensive photograph of the Andromeda galaxy, which contains over 200 million stars.

Messier 31 is located 2.5 million light-years away from Earth and was a much bigger target in the sky than the galaxies ...