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More about why I like this image:
- There are great big giant whorls of SII bubbles or shock fronts about 2/3 of the way to the bottom of the image, and occupying much of the width. I've never seen those before, and they are new, interesting, and telling me something about the grand structure of the region.
- The high colour saturation, while trade-mark Andy, does seem to have some meaning here. There are structures that are almost totally different in their emission characteristics from other structures. An example is the large rose-like structure toward the top of the image. Again that is telling us something about the dynamics of the region.
I'm used to the idea that in Hubble palette, the shortest wavelengths in real life (here OIII) should be the bluest. That's a bit like driving on the left in Australia, just a helpful convention.
Overall, I really like the image because of what it is telling me about the region: as well as all the familiar bits, there are truly huge structures of relatively pure emission spectrum that I did not know about, which are different to other huge structures of different emission spectrum, and therefore different mechanism of creation, that I also did not know about.
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