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 the NASA/ESA Hubble Space Telescope. Because the image captures both faint dwarf stars and bright giant stars, astronomers can estimate the age of the halo population by analyzing its distribution of colour and brightness. The halo is a spherical cloud of stars around Andromeda, located 2.5 million light-years from Earth.

Credit:

NASA, ESA and T.M. Brown (STScI)

About the Image

NASA press release
NASA caption
Id:opo0315a
Type:Observation
Release date:7 May 2003, 15:45
Size:6116 x 7014 px

About the Object

Name:Andromeda Galaxy, Messier 31, NGC 224
Type:• Local Universe : Galaxy : Type : Spiral
• Local Universe : Galaxy : Component : Halo
• X - Galaxies Images/Videos
Distance:2 million light years
Constellation:Andromeda

Colours & filters

BandWavelengthTelescope
Optical
V
606 nm Hubble Space Telescope
ACS
Optical
Pseudogreen (V+I)
Hubble Space Telescope
ACS
Infrared
I
814 nm Hubble Space Telescope
ACS

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