M20 (often referred to as "Trifid nebula") is a collection of three different nebulae in the Sagittarius constellation, around 9000 light years from earth.
Not only is this a collection of three different nebulae; it’s also three completely different types:
- Dark nebula: this part consists of dark dust clouds that absorb/block any light from stars behind it. You can see this as the black lines in the center of the image.
- Emission nebula: this part consists of clouds of hydrogen that get ionized (think of it as getting energized and glowing) due to the presence of nearby stars. You can see it as the red'ish part of the image.
- Reflection nebula: this part consists of clouds of interstellar dust, which reflect the light of nearby stars. You can see this as the blue part of the image.
Setup:
Planewave CDK24
Moravian C3-61000 Pro
Planewave L-600
Image acquisition details:
14x900" HA
12x600" Red
12x600" Green
12x600" Blue
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