The Blue Flash Nebula is a small planetary nebula created when a star near the end of its life blows off a lot of gas into space. Since this object is so small, I put a larger image of it in the upper left corner. This object is about 4,700 light years distant. Also known as NGC 6905 It was discovered by William Hirschell in 1782. It is located in the constellation Delphinus. The central star of the nebula is a white dwarf about magnitude 14.
Camera: SBIG ST-10XME
Filters: Astrodon LRGB
Dates: August 11-17, 2007
Exposure: LRGB: L=11x5min, RGB=11R, 15G, 11Bx5min each for 4 hours total at -25C