My Photo of the Iris Nebula
Attached is a photo of the "Iris Nebula" that I colorized and enhanced.
This was the first photo that I attempted to colorize and enhance after my "Crab Nebula" one. This attempt was much more successful than my "Crab Nebula" one, due to the fact that I had practiced colorizing and editing on the last photo. It also was brighter than the Crab Nebula to begin with, so I didn't need to focus on stretching up the "Levels" and "Curves" as heavily as I did in the Crab Nebula photo.
Located about 1,300 light-years away, the Iris Nebula (also referred to as "NGC 7023") is located in the 'Cepheus' Constellation, and belongs in the class of Nebula known as a "Reflection". Other well-known 'Reflection Nebulas" are named the "Blue Horsehead Nebula", and the "Running Man Nebula" which is located in the Orion Constellation. The Iris Nebula is also about six light years (35.28 trillion miles) long!
With the help of the BSU Observatory and Professor Kern, I was able to get a clear picture of the Iris Nebula. The original picture did not show much, all I could see was the faint center, which was visible (unlike the Crab Nebula). Once I increased the luminance level and changed the "Curves" and "Levels" tools around slightly, I was able to get a view of the stars and dust clouds surrounding the center of it, that photo is shown below this paragraph.
(This photo was after increasing the "Levels" and "Curves" on the photo, NOT the luminance layer)
You may look at the first photo and notice that the color of it is primarily purple- in fact- its ALL purple. The reason behind this is that prior to increasing the "red" layer's intensity, it was not clear enough for my liking, the dust clouds in the photo were being muted out by the "blue" layer. In order for the clouds to appear prominently, I had to add to the "red" layer's intensity, and it worked, the downside is that it made everything purple.
Below is an photo taken by Trevor Jones, which shows the Iris Nebula being shown as blue, unfortunately, my photo was only clear when I made it look purple.
What gives off it's iconic blue glow is the star that is located inside the Nebula, it is known as "SAO 19158". The reason that it is blue is because of the temperature of the star, which falls between 10-50,000 Kelvin. The star is about ten to fifteen times the mass of our sun, and illuminates the dust clouds surrounding it, which gives us the jaw-dropping beauty of the "Iris Nebula"
SOURCES:
"Stars | Causes of Color" (Webexhibits)
"Iris Nebula" (StarryWonders)
Iris Nebula
"The Iris Nebula" (AstroBackyard)
The Iris Nebula in Cepheus contains a lot of dark interstellar dust that blocks out surrounding starlight. Showcase these areas and the mix
"iris Nebula" (Wikipedia)
Photo Credits:
BSU Observatory
Trevor Jones
NASA















