German European Space Agency astronaut Matthias Maurer looks on during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

German European Space Agency astronaut Matthias Maurer walks with training equipment along the building during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

This photograph taken on September 17, 2024 shows a general view inside of the Luna Analog Facility building during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

German European Space Agency astronaut Alexander Gerst looks during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

German European Space Agency astronaut Matthias Maurer walks with training equipment along the building during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

This photograph taken on September 17, 2024 shows a footprint on the sand during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

German European Space Agency astronaut Matthias Maurer poses for a portrait during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)

German European Space Agency astronaut Alexander Gerst looks during the presentation of the training ground facility for astronauts and technology called "Luna" designed to recreate the lunar surface on September 17, 2024 at the European Astronaut Centre (EAC) in Cologne, western Germany. (Photo by PAU BARRENA / AFP) (Photo by PAU BARRENA/AFP via Getty Images)