I started learning how to photograph the night sky so that I could try and capture the beauty of the sky in one of the few places left on Earth where it is actually dark at night. It is so dark here in Valley of the Gods, Utah, that when you step outside it takes a bit of adjustment to see at all, other than the stars above.
Anyway, after trying what seemed like a million different settings for my Canon Rebel T6i, I found a combination that worked really well. I got my info from an article on the web. Astrophotography Tips
Basically, the most critical setting is the f-stop. It needs to be set so the aperture is as wide as possible, which means a low number. Then the ISO needs to be set low too. This seemed counter intuitive to me, but high ISO with long exposures creates a “noisy” image. Finally, the length of the exposure.
So, I set the ISO to 200, the F-stop to 2 and exposed the image for 30 seconds using the remote control. Here is the final product, with no retouching.