Astra Image 3.0 Pro ((free))

Noise is the enemy of every astrophotographer. Astra Image uses adaptive noise reduction algorithms designed specifically for the random noise patterns found in low-light long-exposure photography. The software can smooth out the "grain" in the background sky while preserving the delicate photon data of faint stars and galaxies.

Here is a deep dive into what makes this tool a staple for high-end image restoration and planetary enhancement. astra image 3.0 pro