ngc 6992, the eastern portion of the Veil nebula in cygnus.
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North is up in this image. and it will some day form the upper left corner or a mosaic (he says)... This part is often called the network nebula
because of its many fine lacy filaments. It is thought that the filaments are visual effects of looking directly edge on at the thin layers
of the "bubble" formed by a massive explosion. Whatever the reason, it is a beautiful oject. The composition is believed to be a combination
of hydrogen, oxygen, and sulfur. When ionized by an energetic star, the hydrogen and sulfur emit red light, and the oxygen a teal green.
 Telescope Explore Scientific David H. Levy Comet Hunter Maksutov-Newtonian 152mm f/4.8 mounted piggyback on Meade LX 200 Classic 12 inch
Camera Canon XT/350d modified with Baader type 1 filter by Hap Griffin
Exposure  54 five-minute sub-exposures at iso 800
 Guiding  PHD Guide from Stark labs with Meade DSI pro I on Meade 12-inch LX 200 Classic at f/3.3
 Software  Images acquired, calibrated, stacked and color corrected with Nebulosity 2.3.2 from Stark Labs. Further processing in Photoshop CS 3.
on-line links to more information 

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or David Darling's encyclopedia for more, at

copyright chuck kimball 2010