The Observatorio de Sierra Nevada (Sierra Nevada Observatory, OSN) is located at Loma de Dilar (2896 m altitude) in the Sierra Nevada mountain range, in the province of Granada, established in 1981. It is operated and maintained by the Instituto de AstrofĂsica de AndalucĂa (Institute of Astrophysics of Andalusia - IAA) and contains two Nasmyth telescopes with apertures of 1.5 and 0.9 metres.
Gallery
<gallery>Image:SierraNevadaObservatoryOpticalTelescope.JPG|The IAA modern optical telescopesImage:SierraNevadaObservatoryRadioTelescope.JPG|A radio telescope maintained by IRAMImage:Sierra Nevada Observatory Radio Telescope Closeup.jpg|Closeup of the IRAMradio telescopeImage:SierraNevadaObservatoryOldTelescope.JPG|An older telescopeImage:OSN - Observatorio de Sierra Nevada - IAA -Telescope 1.5m.jpg|OAN 1.5</gallery>