How to use a telescope in the educational center
Teachers workshop
Space Science Experience
Work on scientific cases with us at ESAC or in your school
Solar Observatory
See the Sun online and use the images in the on line tools for science
Optical telescope
NASA´s Deep Space Communications Complex in Madrid
CESAR is an educational ESA initiative whose main objective is to engage secondary school students with the wonders of astronomy and, more generally, science and technology.

See our For Educators section to see what experiences we offer.

Read more about CESAR
27/07/2018 - Blood Moon: longest eclipse in a century
CESAR team witnessed and recorded on 27th July 2018 the longer lunar eclipse in a century, from ESAC (European Space Astronomy Center).
28/05/2018 - Curso de profesores Explora el Universo con tu clase (es)
Explora el Universo con tu clase es el primer curso de la iniciativa CESAR, 100% dedicado a formar a profesores de secundaria en cómo realizar en su clase casos científicos con contenido de Astronomia y ciencias del Espacio. Los datos empleados corresponden a imagenes del Sol, tomadas por el telescopio solar CESAR en ESAC, y de las misiones espaciales ESA/NASA, accesibles a traves de ESASky.
21/03/2018 - Eratosthenes Experiment 2018
The CESAR team organized a special experimental activity about the classical Earth’s diameter calculation, with the Caude School of Majadahonda, Madrid and IES Manuel de Falla, Maracena, Granada. The 1-2 ESO students (12-14 years old) learnt how in 200 BC, the Greek mathematician Eratosthenes calculated the circumference of the Earth using simple geometry and a few measurements. In the activity of discovery, students used sticks, shadows, and abstraction, using Eratosthenes’s assumptions and a few pieces of information.
12/02/2018 - Diamond ring
A diamond ring for San Valentine

Presentation by Javier Ventura - ESA/ESAC/CESAR (English)
Hedgerow Prominences
Hedgerow Prominences detected on 19/10/2017 and 21/11/2017 from the Helios Observatory
Timelapse of Mercury transit in Cerro Paranal, visible light
Final visible transit video, 9 of May 2016
Timelapse of Mercury transit in Teide, visible light
Final visible transit video, 9 of May 2016