Weather

Discover the weather data from the Calar Alto station.

CAHA webcams

Live access to cameras of Calar Alto.

Fireballs

Take a look at the incredible meteorites and fireballs captured.

Visit Caha

Visit our facilities.

Image

Weather

Discover the weather data from the Calar Alto station.

CAHA webcams

Live access to cameras of Calar Alto.

Meteors and Fireballs

Take a look at the incredible meteorites and fireballs captured by the observatory's cameras.

Visit Caha

Visit our facilities.

Centro Astronómico Hispano en Andalucía

ABOUT THE HISPANIC ASTRONOMICAL CENTER IN ANDALUSIA

The Hispanic Astronomical Center in Andalusia (CAHA), also known as the Calar Alto Observatory, is the largest astronomical observatory in the European continent, located in Calar Alto, a plateau 2168 m high in the Sierra de Filabres, in the province of Almería, Spain.
Founded in 1973 following an agreement between the German and Spanish governments, the observatory has five telescopes with different apertures and optical systems, with the 3.5 m telescope being the largest telescope on the European continent. The observatory is jointly operated by the Institute of Astrophysics of Andalusia - CSIC and the Andalusian Government since 2019 and conducts cutting-edge scientific research in various fields of astronomy, such as the search for exoplanets, star formation, galactic structure, and cosmology.

Research and projects

CARMENES LEGACY+
CARMENES LEGACY+ extends the original program (2016-2020), observing 300+ M dwarf stars and discovering 30+ exoplanets. Its goal: four more years of observation to enhance precision, detecting exoplanets with longer orbital periods.
TARSIS
Tetra-ARmed Super-Ifu Spectrograph project utilizes the 3.5m telescope at Calar Alto Observatory. It detects near-ultraviolet light and explores the challenging region with high sky transparency, unexplored from Earth.
KOBE
Award-winning experiment, 175 nights at Calar Alto Observatory (Spain), using CARMENES to find habitable exoplanets around late K-dwarfs (3800-4600 K).
CARMENES+
CARMENES+ enhances the CARMENES spectrograph, enabling high-resolution spectra acquisition in the visible and near-infrared. This upgrade broadens the search for rocky planets among M dwarf stars and enhances its capacity to detect and analyze potential atmospheres.
CAVITY
CAVITY is a Calar Alto Observatory Legacy project. It explores galaxies in voids, studying mass assembly, dark matter, baryonic matter, and gas properties in low-density regions.
BHOLE
BHOLE is a Chinese program studying black hole-galaxy coevolution. It measures masses, studies host galaxies, searches for high-redshift quasars, and researches active galaxy engines.
NEON School
The 27th NEON Observing School will be held at the Calar Alto Observatory.This program offers a unique opportunity for astronomy Ph.D. students, late-stage MSc students, and early-career researchers without prior observing experience. The school is scheduled for February 2-14, 2025. The event provides hands-on experience with professional telescopes, complemented by lectures on modern observing techniques and data analysis.
Observation Time at CAHA

To observe at Calar Alto,

The largest observatory in Europe, you must request observation time on one of its two main telescopes, the 2.2 m or the 3.5 m. You must be affiliated with a Spanish institution or apply through OPTICON ORP if you are from another European country. You can also purchase observation time if you have a very strong scientific case.

You must choose the observation mode: visitor or service. In the visitor mode, you travel to the observatory and operate the telescope yourself. In the service mode, the observatory staff conducts the observations for you. You must select the instrument, the mode, and the filters you want to use for each telescope from those offered by the observatory on its website.

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Visit the Observatory

Spain is a global power in the production of scientific knowledge in the disciplines of astronomy and astrophysics, and the Calar Alto Astronomical Observatory, the largest complex of its kind in continental Europe, has been largely responsible for this over its 50 years of existence.

During the Daytime Visit to the Observatory, you will have the opportunity to learn in an enjoyable and entertaining way how this Scientific and Technical Singular Infrastructure (ICTS) works. From this cathedral of science, we will tell you about the discoveries that are made with these giant telescopes, as well as the relationship between the technological development necessary to expand our knowledge of the Universe and the domestic applications of this technology in our daily lives. And all this while you contemplate the 240 tons of the 3.5m telescope, the largest on the continent! The approximate duration of the visit is 2 hours and it is guided by qualified personnel with scientific training.

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