The Jellyfish Nebula is a large supernova remnant in the constellation of Gemini, about 5,000 light years away. The explosion is thought to have happened somewhere between 3,000 and 30,000 years ago.
The background of the image appears very mottled. I thought this was a processing problem, but it's a real effect, caused by ripples from the shockwave passing through a molecular cloud. Wikipedia has information on it:
https://en.wikipedia.org/wiki/IC_443Another nice feature is the strange red spot at the top left of the image, which I thought was a glitch. This turned out to be a small planetary nebula called Howell-Crisp 1 or HoCr 1 which was discovered in 2006.
I had a lot of trouble taming the huge halos on the two stars Tejat and Propus, but the effort was well worth it. It also reminds me to stay clear of bright stars with the L-eXtreme!
Clear Skies!
Tony.
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