Televue 127is; AP 1100GTO Mount
QHY600M, - Antlia Pro Broadband Filters
R,G,B: (22,24,32 x 100s, Bin 1, Gain 26)
H,O,S: (26,28,30 x 200s, Bin 1, Gain 26)
H,O,S:(38, 32,23 x 500s, Bin 1, Gain 26)
Total integration time = 19.8 hrs (Dec3,8,11 2024 & Jan.24,25,26 2025) Vancouver Island, BC, Canada

The Orion Nebula is very bright and generally not a difficult object to image, but for me, I have to content with very high trees to my South coupled with generally poor winter weather on Vancouver Island. This data was left unprocessed from last winter and I was wondering if I needed more integration time to get a decent image. So to finish my target planning for this winter, I thought I would process what I had.
I used my own formulas for HDR composition and managed to get a good dynamic range from my short and longer exposure combination, HDRMT, and GHS stretching.
Within the image all four predominant states of hydrogen can be "seen". The nebulosity consisting of hydrogen molecules and dust can be "seen" as darker areas and regions of reflection. Hydrogen atoms can be seen in the hydrogen alpha (red to yellow) areas in the image as molecules - first disassociated and ionized by stars - recaptures its electrons and returns to its ground atomic state. Hydrogen ions, can really be seen, but they form the hot plasma / stellar winds around stars that impinges upon the molecular clouds. It's is the accompanying UV light that ultimately heats, ionizes, and erodes the molecular clouds. The fourth phase of hydrogen exists within the stars, existing as a largely incompressible plasma / hot liquid metal (or whatever nomenclature you choose).
Of course, there are other astronomical creatures playing bit parts in the creation of stars within the Orion Nebula.