NGC 6888 The Cosmic Brain

22:30–01:30, temperature +18°C. 3-hour window, Sun at -15° below the horizon. Offset 10, -10°C. 50 darks, 50 flats, 50 dark flats. No Photoshop, only stacking, brightness, and white balance. Frame-by-frame alignment. Yellow light pollution zone, 14 km from the city of Kazan (population over 1 million).