Gregorian telescope

A Gregorian telescope is a type of reflecting telescope designed to gather and focus light for detailed observation. It uses two mirrors: a large concave primary mirror that collects light and a smaller concave secondary mirror positioned inside the main mirror’s curve. Light reflects off the primary, then the secondary, which directs it to an eyepiece or camera located behind the primary mirror. This design produces a clear, inverted image and offers advantages like compactness and the ability to use custom-shaped mirrors for improved image quality. It’s commonly used in astronomy for detailed celestial observations.