Even though paid software like and Astro Pixel Processor exists, DeepSkyStacker remains the best starting point for beginners. It is reliable, well-documented, and produces results that compete with expensive tools.
Once you have stacked your first image of the Orion Nebula or the Pleiades, you will never go back to single-frame astrophotography again. deep sky stacker download
But stacking hundreds of RAW photos of the Andromeda Galaxy manually is impossible. That is where comes in. It is the gold standard, free software for deep-sky image processing. Even though paid software like and Astro Pixel