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English ESA Open Day 2025: An Unforgettable Journey Through Space Science at ESAC

On 4 October 2025, the European Space Agency opened the doors of ESAC – the European Space Astronomy Centre near Madrid – for an inspiring day of discovery. Visitors had the opportunity to explore ESA’s window to the Universe, where missions studying our Solar System, the Milky Way and the distant Universe are operated and analysed.

Throughout the day, guests met ESA scientists and engineers, learned about missions such as Gaia, XMM-Newton, and JUICE, and experienced hands-on activities that brought the wonders of astrophysics and planetary

No communication or navigation, faulty electronics and collision risk. At ESA’s mission control in Darmstadt, teams faced a scenario unlike any before: a solar storm of extreme magnitude. Fortunately, this nightmare unfolded not in reality, but as part of the simulation campaign for Sentinel-1D, pushing the boundaries of spacecraft operations and space weather preparedness.

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