Maciej Winiarczyk’s awesome video made it on NASA’s Astronomy Photo of the Day:
Why would the sky still glow after sunset? Besides stars and the band of our Milky Way galaxy, the sky might glow because it contains either noctilucent clouds or aurora. Rare individually, both are visible in the above time lapse movie taken over Caithness, Scotland, UK taken during a single night earlier this month.
Do yourself a favor - go fullscreen and blast the music.