by Rod Pommier
Telescope/Mount: Celestron Compustar C14 with 0.75x focal reducer (f/8). Camera: SBIG STL 11000M. Filters: Baader Planetarium LRGB. Exposures: LRGB=180:20:20:20 minutes=4 hours total exposure. Five minute sub-exposures. Self-guided. Location: Pommier Observatory, Portland, OR, USA. Dates: 2011-07-27 and 2011-07-28.
NGC6992 (also known as Caldwell 33), the brightest portion of The Veil Nebula, is the remnant of a supernova that occurred 10-15,000 years ago. Its amazing filamentary structure may be due to compression of expanding shells of gas as they meet the resistance of the interstellar medium.