4º de la ESO + Empresa
Teachers can register their students
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
We are observing the Sun right now. Click here to see all our images



12/02/2018 - Diamond ring
A diamond ring for San Valentine
11/01/2018 - The Sun in 2017
The Sun in 2017 as seen by the CESAR Helios Observatory located at ESAC, Madrid. The posters compile in a calendar form a sample of the images acquired during each day in 2017. Other highlights of 2017 are also shown.
24/11/2017 - ESAC CubeSat Ground Station Presentation
Firsts advances on the new ESAC CubeSat ground station
16/11/2017 - Japanese School special visit
Special talk about JAXA and ESA collaboration, international collaboration in the ISS and next Solar System missions. Also, we present a video recorded by Lectures team, in Japan on September talking about robots, Kibo and Bepicolombo.

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