My favorite DSO is M31 aka Andromeda Because It is coming to merge with our galaxy, Most interesting thing is I can see it even in minimum fog or cloudy weather from my location. Has anyone Checked that, it is amazing that it is getting Brighter overtime, but I was not expecting that many increases in brightness.
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In my lifetime it has gotten dimmer thanks to light pollution. I can usually see it naked eye, but sometimes i have to work for it.
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