Alexander Gerst with spheres

ESA astronaut Alexander Gerst shared this image on his social media channels saying "Experimenting with two autonomously controlled satellite drones, attempting to tug a piece of “space debris” on a tether. Such systems could help to keep Earth orbit clean in the future."

More on the NASA experiment: https://www.nasa.gov/mission_pages/station/research/experiments/2553.html

Follow Alexander and the Horizons mission on social media on his website and on his blog.