The transit circle

Abbadia's meridian transit circle has been in operation for nearly a century and has provided valuable data for all astronomers around the world who have reused these data, the basis for discovering and understanding the universe. Today, the telescope is no longer used by professional astronomers. Amateur astronomers now explain how it works and show how observations are made with this telescope. A camera could make possible recording and retransmitting the images to the public and explaining what we see and what it can be used for.