Want to see the true colors of the night sky? Well, you need to find a really dark spot. And the darkest is Bortle 1. But first, let me explain. The best kind of sky for astrophotography is called a Bortle 1 sky. It is only 0.01 from a perfect sky on the SQM scale. You may already know a few of the night sky wonders: the Aurora, Zodiacal Light, and Airglow, but they are completely different under Bortle 1.