Wow Dan. Spectacular!
What a beautiful filigree, Dan! The colors are striking and the ammout of detail is incredible. I am not familiar with this nebula. I need to do some reading!
They call it the Pencil Nebula, but personally I see the head of a snake – let me know what you think.
The colors of the various regions in the nebula yield clues about this cooling process. Some regions are still so hot that the emission is dominated by ionized oxygen atoms, which glow blue in the picture. Other regions have cooled more and are seen emitting red in the image (cooler hydrogen atoms). In this situation, color shows the temperature of the gas.