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Wide-field Andromeda Galaxy (M31)

This is an uncropped stacked photo of the Andromeda Galaxy. I took 10 photos of 3 minute exposures and then stacked them in DeepSkyStacker. An AstroTrac was used for tracking unguided. This is one of the best tracked photos I've managed to take. I nailed the polar alignment in one go and was amazed that it remained stable even after adjusting the camera and putting on a filter. Yes, the light pollution filter made a big difference if you're wondering.

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Uploaded on November 11, 2009
Taken on November 11, 2009