Intermediate level

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In GIMP, you can enhance your astrophotography image by using these tools:

Color Curves:
 

• Use the Curves tool to adjust the tonal range of your image, refining shadows, midtones, and highlights for better contrast and detail.
   

Saturation:
 

• Adjust the Saturation to make the colors in your image more vivid or subdued, depending on the effect you want.
   

Levels:
 

• Use the Levels tool to fine-tune the brightness and contrast, setting the black, white, and midtones to balance the exposure.
   

Brightness and Contrast:
 

• Modify the Brightness and Contrast to improve the overall lighting of the image, making it pop with more detail and depth.