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NGC 300 in RGB, with an additional 13hrs of hydrogen alpha mapped to red.
The H-alpha shows a zoo of star-forming regions, mostly as smoke-ring structures, splattered along the spiral arms.
L 10hrs 1x1, RGB 4hrs each 2x2, H-alpha 13 hrx 2x2, all in 1hr subs. Aspen CG16M on 20" PlaneWave CDK.
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