This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Lanature telescope lassel. Le tlescope de Lassel dans l'le de Malte pour La Nature revue des sciences page cnam fr cgi KY author This image is in the public domain because its copyright has expired PDold La Nature Revue des Sciences Reflecting telescopes Historical astronomical instruments Equatorial mounts