It also pays to start on a lower ISO setting, and then ramp it up, so you can see the differences in noise and image quality and how it affects your image.
Most cameras will deal with low-light settings in different ways, and some of the best cameras for low light photography are worth looking at to make the most of your pictures of the night sky. It also pays to start on a lower ISO setting, and then ramp it up, so you can see the differences in noise and image quality and how it affects your image.