The 'Star Count Estimator by Bortle Class' is a specialized tool designed to estimate the number of stars visible to the naked eye based on the Bortle Dark-Sky Scale. This scale, ranging from 1 (the darkest skies) to 9 (inner-city skies), provides a reliable method for astronomers and stargazers to gauge sky quality and visibility. The formula used in this calculator is based on the assumption that under optimal conditions, approximately 2820 stars are visible in a Class 1 sky. The visibility of stars decreases exponentially with increasing Bortle numbers, following the formula 2820 * 2.512^(7 - Bortle Class), which accounts for the logarithmic nature of star brightness and human perception. This tool is invaluable for amateur astronomers and educators, providing a quick and easy way to understand the impact of light pollution on star visibility. For more insights on observing the night sky and the importance of preserving dark skies, visit Darkest Hour. The 'Darkest Hour' initiative offers resources and information on how you can contribute to reducing light pollution and protecting our view of the cosmos. By understanding how Bortle Class affects star visibility, we can better appreciate the natural beauty of the night sky and work towards preserving it for future generations. Whether you're planning a stargazing trip or simply curious about the effects of urban lighting, this estimator serves as a practical guide to understanding celestial visibility. Explore the wonders of the universe and the factors that influence our view of it with this essential tool for astronomy enthusiasts.