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Watch ESA astronaut Sławosz’s talk at CERN

CERN engineer and ESA astronaut, Sławosz Uznański-Wiśniewski, recently spoke at CERN about his time in space

A man speaking into a microphone and pointing up to a screen that is out of view. He is wearing a dark blue jacket with ESA logos.

Sławosz Uznański-Wiśniewski speaking at a CERN Colloquium about his journey in space. (Image: P. Traczyk/CERN)

On Thursday 12 March, Sławosz Uznański-Wiśniewski came to CERN to give an insider’s view of his time on the International Space Station (ISS) from 26 June to 14 July 2025.

Sławosz discussed the Ignis mission to the ISS, a Polish-led scientific and technical programme carried out in collaboration with the European Space Agency (ESA). One of the flagship investigations of the mission was developed at CERN and Sławosz personally installed and operated it on the ISS.

During the talk, Sławosz talked about this particular experiment and shared details of his experience in space.

The recording of Sławosz’s talk is now available online.