Equipment and other photo info:
Picture taken on July 21st, 2009.
Location: Petrova gora/Croatia/Europe
SkyWatcher ED80 + WO 0.8x, Canon EOS 400D 11x480sec @ ISO800 Guiding with Maksutov 90/1250 + QHY5 guiding camera (PHD Guiding)
Mount: EQ6 Vis upgraded to EQ6 SynScan
Processing software: IRIS, PixInsight, PhotoShop CS4
At an apparent magnitude of 4.4, the Andromeda Galaxy is notable for being one of the brightest Messier objects, making it easily visible to the naked eye even when viewed from areas with moderate light pollution. Although it appears more than six times as wide as the full moon when photographed through a larger telescope, only the brighter central region is visible with the naked eye.
Like the Milky Way, Andromeda Galaxy has satellite galaxies, consisting of 14 known dwarf galaxies. The best known and most readily observed satellite galaxies are M32 and M110. Based on current evidence, it appears that M32 underwent a close encounter with M31 (Andromeda) in the past. M32 may once have been a larger galaxy that had its stellar disk removed by M31, and underwent a sharp increase of star formation in the core region, which lasted until the relatively recent past.
More information about this object at: http://seds.org/messier/m/m031.html