On 3 October, ESA’s European Space Astronomy Centre (ESAC) in Spain opened its doors to over 2500 visitors for ESA Open Days 2026. From exploring the Solar System and discovering ESA’s missions, to meeting experts and getting hands-on with space through interactive activities, there was plenty to see and do.

Visitors could experience a virtual journey through the Universe, discover missions such as BepiColombo and Gaia, explore Earth observation and planetary defence, and step into the world of human and robotic exploration. From training like an astronaut and commanding a Mars rover to exploring ESA’s latest activities with Reserve Astronaut Sara García Alonso, the day offered a glimpse into the people, missions and technology behind Europe’s space programme.