NGC6992 Eastern Veil Nebula  
Scope: Deep Sky Instruments RC10c 254mm @ f/7.4 / FL= 1880mm Corrected Ritchey Chretien  
Camera: FLI- ML11002M with FLI (7 position filter wheel CFW-5-7) 
Total Exposure: HAa= (44) subs @ 30 min for a Total of 22.0 hrs.........................OIII= (44) subs @ 30 min for a Total of 22.0 hrs.
September 2013: Chico, California, USA 
Comments: This image shows a small portion of an immense supernova reminant the exploded some 8,000 years ago. The above image captures some of that filamentary and gigantic shock in Ha light. Hydrogen atoms being excited by atomic collisions glow.