An approximately 3-hour exposure of the Andromeda Galaxy. Exposure started a little after 2am when the galaxy appeared above my neighbor's roof and ended at around 5 when the sun came up.
Sky fog limited the subs to no longer than 3 min and stacking was done with DSS.
This was supposed to be part of a project with more subs however before I go any further I have to figure out what causes the lines that run across the image. What I don't get is that If it's some sort of noise then it should be random and not forming those ray-like patterns. I've already ruled out the lens and the camera as the source of the rays as the rays showed up even when I tried another scope and they do not appear in the darks. I think they might be rays of light from my neighbor's security light but I'm not sure. Have to try a longer dew-shield and see if it makes a difference. So for now, not knowing what causes them, I'm gonna call them cosmic rays :)
I'm posting this although it still needs a lot of work to look decent to see if anyone else got these weird lines and could let me know how to fix/prevent them. All comments are appreciated :)
Tags: Andromeda Galaxy astrophotography noise Messier M31 NGC 224 Astrometrydotnet:version=14400 Astrometrydotnet:id=alpha-201008-37975142 Astrometrydotnet:status=solved