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IC443 The Jellyfish Nebula is a remnant of a supernova explosion 8,000 years ago in Gemini. Energetic shock waves from the supernova excite hydrogen within a molecular cloud, creating lattice like filaments of luminosity.

30 x 6 min subs taken with modded Canon 450d on M-N Skywatcher 190 F5.3/EQ6, with Astronomic UHC Filter blended with 19 x15 min subs with Baader 7nm Narrowband Filter, guided by PHD and stacked in DSS / processed in Photoshop CS. [Ian Smith]