I did a series of nightscapes about 3 weeks ago.
A lot of air glow was present at the time.
This is with a new Sony A7r3 using its pixel shift technology which is not dissimilar to LRGB imaging like we do with deep sky objects. It takes 4 images each one moved one pixel so each colour gets al 4 pixels when combined.
Sigma Art 14mm F1.8 30 seconds tracked at ISO6400. 3 panels.
http://www.pbase.com/image/167076502/large
Greg.