The image shows a jet from the black hole Cygnus X-1. 22:30-01:30, temperature +18°C. A 3-hour window, with the Sun at a depth of -15 degrees. Offset 10, -10°C. 50 darks, 50 flats, 50 dark flats. No Photoshop, just stacking, brightness, and white balance. Tracking adjustments for each frame. Yellow zone of light pollution, 14 km from the city of Kazan (population over one million). Total integration time: 2 hours 24 minutes.
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