Fig. 30: A tree is groung out of the yellow light pollution and growing towards the celestial north pole which is circled by the circumpolar stars. Starparty at Ahornalp in Emmental, canton Berne. — EXIF: Nikon D3; Δt=240 s; f=17 mm; f/4.0; ISO 200; 2011-05-07 0:30:27
