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.

But only one galaxy stands out as the most important nearby stellar island to our Milky Way -- the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear ...

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

But only one galaxy stands out as the most important nearby stellar island to our Milky Way—the magnificent Andromeda galaxy (Messier 31). It can be seen with the naked eye on a very clear ...

This illustration shows a stage in the predicted merger between our Milky Way galaxy and the ... [+] neighboring Andromeda galaxy, as it will unfold over the next several billion years.

Video of the largest photomosaic ever assembled from Hubble Space Telescope observations. The camera pans along the Andromeda Galaxy's vast disk which is over 200,000 light-years across. (Credit: ...

A close-up view of a prodigious number of stars in the Andromeda galaxy. Credit: NASA / ESA / B. Williams (U. of Washington) The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 ...

That’s almost half the distance to Andromeda. Have you ever seen the Andromeda galaxy? Go outside after dark this month and look high up in the northeast sky and you’ll find the W-shaped ...

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