Calar Alto Observatory

The Calar Alto Observatory (Centro Astronómico Hispano en Andalucía or "Spanish Astronomical Centre in Andalusia") is an astronomical observatory located in Almería province in Spain on Calar Alto, a 2,168-meter-high (7,113 ft) mountain in the Sierra de Los Filabres subrange of the Sierra Nevada.

It was named the "German–Spanish Astronomical Centre" (in Spanish, Centro Astronómico Hispano-Alemán (CAHA); in German, Deutsch-Spanisches Astronomisches Zentrum).

[4] The CARMENES survey (Calar Alto high-Resolution search for M-dwarfs with Exoearths with Near-infrared and optical Échelle Spectrographs) is a project to examine approximately 300 M-dwarf stars for signs of exoplanets with the CARMENES instrument on Calar Alto's 3.5m telescope.

Operating since 2016, it aims to find Earth-sized exoplanets around 2 ME (Earth masses) using Doppler spectroscopy (also called the radial velocity method).

[5][6] Close to a hundred minor planets have been discovered at Calar Alto by astronomers Luboš Kohoutek, Kurt Birkle, Ulrich Hopp, Johann Baur, Krisztián Sárneczky, Gyula Szabó, Felix Hormuth and Hermann Boehnhardt.

Calar Alto completely snowed after the Storm Filomena in January 2021.