Andromeda Galaxy, Messier 31

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Andromeda Galaxy, Messier 31 is about 2.5 million light-years away from Earth. It is the nearest major galaxy to our own Milky Way Galaxy?  In fact, our Galaxy is thought to look much like Andromeda. Together these two galaxies dominate the Local Group of galaxies that are gravitationally bound together. The diffuse light from Andromeda is caused by the hundreds of billions of stars that compose it. The several distinct stars that surround Andromeda‘s image are actually stars in our Galaxy. M31 is so distant it takes over two million years for light to reach us from there. While most galaxies are moving away from us, the Andromeda is destined to collide with the Milky Way Galaxy in 4 billion years.

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Optics: 6″ Takahashi FS152, f6 reducer
Mount: Celestron CGE Pro
Camera: FLI PL16803
Filters: FLI LRGB, Ha
Dates/Times: Feb 2013
Location: Earth and Sky Observatory, Jackson Hole WY
Exposure Details: L=23x10min,1:1, R,G,B=23x5min, 2:2, Ha=7x10min, 4:4, total 99 images, 10hr,45min
Acquisition: MaxImDl, SkyX, Guiding Takahashi FSQ85, SBIG STF 8300m
Processing: MaximDl, Photoshop CC