The Andromeda Galaxy, our Milky Way’s colossal neighbor, lies 2.5 million light-years away yet shines visibly in dark skies.

The Andromeda Galaxy (M31, NGC 224) is a truly stunning and colossal presence in our universe, located 2.5 million light years away in the Andromeda constellation. This supergiant spiral galaxy, often ...

Particular stars called Cepheid variables allow astronomers to determine distance, and Hubble spotted one of these within M31.

The Andromeda galaxy lies just beyond (...OK, about 2.5 million light-years beyond) our galaxy, the Milky Way. For the past hundred years or so, scientists thought these galaxies existed in a long ...

NASA's Chandra X-ray Observatory provides a new look at the Andromeda galaxy in this multi-wavelength image that includes X-ray, ultraviolet, optical, infrared, and radio images and illustrates the ...

A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data ...

A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data from ...

NASA's Chandra X-ray space telescope has captured a breathtaking image of the neighboring Andromeda galaxy, in a tribute to dark matter pioneer Vera Rubin.

A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data ...

More The Andromeda galaxy's spiralling stars are played as musical notes in a new NASA observatory video, creating a cosmic crescendo that's out of this world. The sonification video, released by ...

Andromeda never looked as good as it does in a new image from the Chandra X-ray observatory and a range of powerful telescopes. A fitting tribute to dark matter pioneer Vera Rubin.