Double space science

ESA astronaut Alexander Gerst working on an experiment in the microgravity glovebox on the International Space Station. On his forehead he has a thermometer to measure his temperature continuously.

He Tweeted this image during his six-month Blue Dot mission with the text: “Dual Science – wearing a circadian rhythm sensor while working in the glovebox.”

The International Space Station is a collaboration between five space agencies, sharing resources and time to run out-of-this-world experiments.

Read more about Alexander's six-month Blue Dot mission at  http://www.esa.int/Our_Activities/Human_Spaceflight/Blue_dot

Follow Alexander here: http://alexandergerst.esa.int/