Calar Alto

Location in southern Spain of an observatory constructed by the Max-Planck-Institut für Astronomie and operated jointly with the Spanish National Commission for Astronomy. The telescopes are 1.2-metre (4-foot), 2.2-metre (7-foot) and 3.5-metre (11.5-foot) reflectors, together with a 0.8-metre (2.5-foot) Schmidt camera. A 1.5-metre(5-foot) telescope operated by the University of Madrid is also at the site.