Matthias Maurer, Dosis 3D and Thermo-Mini

The body of ESA astronaut Matthias Maurer is the subject of several science studies during his stay on the International Space Station. The thermal sensor strapped to his forehead monitors his core temperature and circadian rhythm for the Thermo-Mini experiment. Radiation is another well-known space hazard. Matthias dotted 21 Dosis 3D radiometers around the Station to get an overview of where radiation is most prominent. He placed 10 pouches inside the Columbus lab, and scattered a few others in other locations to build a three-dimensional map of the radiation environment.

He tweeted this picture with the following caption: "I felt a bit like Santa Claus dishing out Dosis-3D radiation monitors in the Space Station. My headwear's a bit different though. It monitors my core body temperature for the experiment Thermo-Mini."