Step-by-step
ORDER IS IMPORTANT, BUT FLEXIBLE
- Step 0: Use Display colour calibration tool before starting
- Step1: Set mode to 16-bit color, crop edges to remove stacking artifacts and duplicate layer
- Step 2: Set black-point and adjust your levels
- Step 3: Curves
- Step 4: Fix gradients
- Step 5: Adjust Levels
- Step 6: color balance
- Step 7: Noise reduction
Beginner’s Tutorials
Steps as shown by AstroFarsography
Astrophotography Editing Tutorial In Photoshop - AstroFarsography
Steps as shown by AstroStace
Beginner Photoshop Astrophotography Editing Tutorial
More advanced methods
Arcsinh Stretch in Photoshop to preserve color by Mark Shelly