Thanks for commenting Murray Cotton. Actually, this is not a composite but rather simply one of 150 frames taken during a timelapse sequence I was shooting to capture the Milky Way rising over the Erratic. With this FOV, a lot of the light pollution can be mitigated with proper Milky Way capture techniques.
Gorgeous image. composite of 2 exposure it looks like. Looks good not to much light pollution it seems even though close to Calgary and a bunch of small towns.