The Andromeda Galaxy (also called M31) is the closest spiral galaxy to the Milky Way Galaxy. It is approximately 2.5 million light years away and is the farthest object that can be seen with the naked eye. It's estimated to contain one trillion stars and is predicted to collide with the Milky Way Galaxy in approximately 3.75 billion years.

Technical Information       
Date:                       September, 2013
Location:                 Green Valley, Arizona
Telescope:              Takahashi FSQ-106EDX
Camera:                  SBIG STT-8300M
Filters:                     Astrodon Gen 2
Mount:                     AstroPhysics 1200
Exposure:                LRGB = 450:120:120:120 minutes, all unbinned
Software:                 Acquisition: Maxim DL 5, TheSkyX, Pinpoint, CCD Commander
                                Processing: CCDStack, PhotoShop CS6 with various plugins

Andromeda Galaxy (M31)