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More Images of M31
Click for large jpg Optical
Jpeg, Tif, PS
Click for large jpg X-ray Before
Jpeg, Tif, PS
Click for large jpg X-ray After
Jpeg, Tif, PS
X-ray and Optical Images of M31
The optical image from the Digitized Sky Survey shows the Andromeda Galaxy, otherwise known as M31. The first Chandra image shows a small region in the center of Andromeda taken before January 2006 and the second shows the same region taken after January 2006. Before 2006, three X-ray sources are clearly visible, including one faint source close to the center of the image. After 2006, a fourth source, called M31*, appears just below and to the right of the central source, produced by material falling onto the supermassive black hole in M31.
(Credit: X-ray (NASA/CXC/SAO/Li et al.), Optical (DSS))
Scale Bar Image
Optical Scale
Jpeg, Tif, PS
Click for large jpg Before Scale
Jpeg, Tif, PS
Click for large jpg After Scale
Jpeg, Tif, PS
M31 with Scale Bar
(Credit: X-ray (NASA/CXC/SAO/Li et al.), Optical (DSS)

Return to M31 (May 25, 2010)