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.
Hegra and not bob tubbs . The HEGRA and the Nordic Optical Telescope at Roque de los Muchachos Observatory La Palma Photo by Bob Tubbs July HEGRA Nordic Optical Telescope
Page 2023 Free-images.com. All images are Public Domain