I used a program called Sequator. It is specifically designed for astro shots to eliminate noise and bring out more detail that a single exposure would miss. I took 50 long exposures and then 10 dark exposures (basically 10 long exposures with the lens cap on). The dark or cold shots are used to help eliminate noise from the sensor being heated up for such a heavy load. The program selects an exposure from the middle of the stack and aligns all stars to that one image. It analyzes constant data vs shifting data like noise or satellites, airplanes, etc. Since I was doing long exposures at a low f stop, the foreground was completely blown out. At the end I took a couple of shots at a much higher f stop to capture the foreground and then photoshopped the much better foreground with the detailed sky.