https://www.laanscapes.com/processing-videos/nightscapes-2
First, you’ll learn how to extract detail from a single raw file of the Milky Way like a pro. Then, forget that you need to use a single file. We’re doing what NASA does, but we’re combining that with landscape photography. Sounds complex? It is. But we’re taking it one step at a time in this 3 hour nightscape tutorial. You don’t have to be an expert at post-processing at all, but I do recommend that you’re comfortable with Photoshop.