Two exposure shots were manually blended in post processing. First shot was Lupines with f11.0, 4 sec. (Nikon 16-35 mm. @ 16 mm.) and another shot was sky and stars with f2.8, 15 sec. (Carl Zeiss ZF 21mm.).
See 'Behind the scene' VDO Clip of this photo and following more post processing techniques or photography tips from my official page, "AtomicZen. Blackbox."