Multiscale Boiling checks

ESA astronaut Luca Parmitano working on the Rubi Multiscale Boiling experiment during his Beyond mission to the International Space Station. Luca tweeted this image with the caption: Working on Rubi, to change the power configuration of the experiment and make it operational. Find out more about Rubi on the ESA website: https://www.esa.int/Our_Activities/Human_and_Robotic_Exploration/Research/Bubbles_in_space