H-R Diagram Comparing Ages of Milky Way and M31

Young and Old Stars Found in Andromeda's Halo

The deepest visible-light image ever taken of the sky resolves approximately 300,000 stars in the halo of the nearest neighboring spiral galaxy, Andromeda (M31). The photo was taken with the Advanced Camera for Surveys aboard NASA's Hubble Space Telescope. Because the image...

Postcards from Andromeda

Glittering stars. Distorted galaxies. A cluster of more than 100,000 stars. The celestial objects in this six-panel photograph are just a sampling of the more than 300,000 stars and the thousands of distant galaxies seen in the image of a small region of the Andromeda galaxy's...

Andromeda Galaxy Halo Details

Postcards from Andromeda: Andromeda Galaxy Halo Details

Postcards from Andromeda: Andromeda Galaxy Halo Details

Postcards from Andromeda: Andromeda Galaxy Halo Details

Postcards from Andromeda: Andromeda Galaxy Halo Details

Postcards from Andromeda: Andromeda Galaxy Halo Details - 6

Relative Location of M31 and Milky Way

Location of Details in ACS Image

Location of M31 in Andromeda

Location of ACS Image in M31

Zoom into ACS Image of M31 Halo

A Zoom into the constellation Andromeda reveals the magnificent galaxy M31. Zoom continues to Hubble's Advanced Camera for Surveys image of a small portion of the M31 halo of stars. This spherical halo of stars surrounding the neighboring Andromeda galaxy has revealed...

Pan Across ACS Image of M31 Halo

Pan sequence of the Hubble's Advanced Camera for Surveys image of the M31 halo. The camera moves across various sections of the deep field, revealing myriad galaxies and stars. The complete Hubble view contains several hundred thousand stars and thousand of background galaxies.