Interesting to see the difference between clear and really clear sky

[peroni]

Hey all

I thought last night was clear. It certainly was at first but became a bit hazy/frosty later on. Tonight is better and looks set to continue, hopefully without the haze. So why this tread? Just a couple of 15 mins single images taken with an Ha filter. I thought it was quite interesting to see the difference in detail that the camera picked up on similar evenings.

Last nights...

And tonights...

[Thalestris24]

Hi

I notice the changes in transparency a lot here in Glasgow. It's rarely truly clear but, yeah, some nights are better than others. I keep an eye on the Met forecast (fwiw!) and if it actually is 'clear' then it's clearer when the humidity values are lower - what you'd expect really

Louise

[peroni]

Hi

I notice the changes in transparency a lot here in Glasgow. It's rarely truly clear but, yeah, some nights are better than others. I keep an eye on the Met forecast (fwiw!) and if it actually is 'clear' then it's clearer when the humidity values are lower - what you'd expect really

Louise

I agree Louise. It's kinda obvious that when it's hazy or frosty then seeing (clearness) is impacted. I was certainly surprised with the extent of the impact as last night appeared not much less clear than tonight. The images however, show the full story.

[wxsatuser]

Recently clear nights here have always had haze or contrails, true clear nights are very rare.

[red dwalf]

one of the biggest advantages you can get when astro imaging is to have a truly dark sky, the difference to somewhere even slightly light polluted is amazing.

[JR1987]

NIce! never realised how much difference those tiny variables can make.