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Most likely the ejected shell of an exploded star, the "Bubble Nebula" is approximately
11,000 light years from Earth.
Image acquired using SBIG St-10XME camera with Astrodon filter set through 12" Meade
Lx-200 GPS telescope with Celestron .63x reducer.
120 minutes of Luminance through Luminance filter, 1x1 binning.
40 minutes each of Red, Green and Blue, 2x2 binning.
Five minute sub-frames.