![](https://astro.auguststurm.com/wp-content/uploads/2021/03/2021-03-21T20.27.43.png)
This image was processed by Siril a free and open source Astrophotography pre and post processing, stacking, and more. Runs on Linux, Windows, and macOS.
Below is using Photoshop utilizing a Smart Object of all 19 images gathered. Photoshop did a pretty good job, but Siril has way more horsepower dedicated to astrophotography.
![](https://astro.auguststurm.com/wp-content/uploads/2021/03/OrionNebula_003.jpg)