A selection of skies made for my "Night Skies HDRI Collection Vol.1" available here:

Website: https://andreacantelli.art/store/XkPK7/night-skies-hdri-collection-vol-1-6-skies-at-16k-resolution-clouds-atmosphere-masks
ArtStation: https://www.artstation.com/a/27344987
Gumroad: https://andreacantelli.gumroad.com/l/wkuvra