Profile
Who is Sławosz Uznański - Wiśniewski?
5 Jun 2025
The Polish astronaut Sławosz Uznański-Wiśniewski will fly into space!
We are proud to announce that Sławosz Uznański-Wiśniewski – a Polish engineer, scientist, and project astronaut of the European Space Agency (ESA) – will undertake a historic flight to the International Space Station (ISS) as part of the Axiom Mission 4 (Ax-4) endeavor. The mission launch is planned no earlier than the spring of 2025.
Who is Sławosz Uznański-Wiśniewski?
Sławosz Uznański was born in 1984 in Łódź. He is a graduate of Politechnika Łódzka, Université de Nantes, and École Polytechnique de l'Université de Nantes. In 2011, he earned a PhD in the design of radiation-resistant circuits for space applications at Aix-Marseille University.
He worked as a reliability expert at CERN, where he was responsible for radiation testing and the development of systems for the Large Hadron Collider (LHC). From 2018 to 2020, he served as the LHC Supervising Engineer, overseeing its daily operation.
In November 2022, he was selected for the ESA astronaut reserve, and from September 2023, he began training as a project astronaut. In August 2024, he was officially assigned to the Ax-4 mission as a mission specialist.
Scientific and Educational MissionDuring his time on the ISS, Uznański will participate in scientific experiments in the fields of biology, medicine, materials physics, and technology, many of which are conducted in collaboration with Polish research institutions. The mission also aims to inspire the younger generation to take an interest in science and technology.
A symbolic moment for Poland
The start of the mission will mark the second time in history that a Polish citizen travels into space—following the pioneering flight of Mirosław Hermaszewski in 1978. Uznański will take the Polish flag that accompanied Hermaszewski, as well as traditional pierogi, aboard the ISS, symbolizing the continuity of Polish presence in space.
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.
Profile
Who is Sławosz Uznański - Wiśniewski?
5 Jun 2025
The Polish astronaut Sławosz Uznański-Wiśniewski will fly into space!
We are proud to announce that Sławosz Uznański-Wiśniewski – a Polish engineer, scientist, and project astronaut of the European Space Agency (ESA) – will undertake a historic flight to the International Space Station (ISS) as part of the Axiom Mission 4 (Ax-4) endeavor. The mission launch is planned no earlier than the spring of 2025.
Who is Sławosz Uznański-Wiśniewski?
Sławosz Uznański was born in 1984 in Łódź. He is a graduate of Politechnika Łódzka, Université de Nantes, and École Polytechnique de l'Université de Nantes. In 2011, he earned a PhD in the design of radiation-resistant circuits for space applications at Aix-Marseille University.
He worked as a reliability expert at CERN, where he was responsible for radiation testing and the development of systems for the Large Hadron Collider (LHC). From 2018 to 2020, he served as the LHC Supervising Engineer, overseeing its daily operation.
In November 2022, he was selected for the ESA astronaut reserve, and from September 2023, he began training as a project astronaut. In August 2024, he was officially assigned to the Ax-4 mission as a mission specialist.
Scientific and Educational MissionDuring his time on the ISS, Uznański will participate in scientific experiments in the fields of biology, medicine, materials physics, and technology, many of which are conducted in collaboration with Polish research institutions. The mission also aims to inspire the younger generation to take an interest in science and technology.
A symbolic moment for Poland
The start of the mission will mark the second time in history that a Polish citizen travels into space—following the pioneering flight of Mirosław Hermaszewski in 1978. Uznański will take the Polish flag that accompanied Hermaszewski, as well as traditional pierogi, aboard the ISS, symbolizing the continuity of Polish presence in space.
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
Farewell ceremony of the Ax‑4 crew on the ISS – watch live!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Read more
14 July: watch the live return of the Ax‑4 mission on our website!
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.
Education
We educate, inspire, and discover
Our mission is to inspire and educate – we believe that the future begins with knowledge. We create an educational space for those who aspire to reach higher.