Kitt Peak National Observatory,Tucson,Arizona,USA,against a night sky. With 23 telescopes,this is the largest collection of astronomical instruments in the world. At right is the Mayall 4-metre telescope (completed in 1973) and at left is the Bok 2.3 metre telescope (opened in 1969 and operated by the Steward Observatory,University of Arizona) | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Tafreshi, Babak |
Bildgröße: | 2414 px × 3732 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |