The International Space Station's robotic arm in front of the Cupola observatory and Japanese laboratory Kibo at night, 23 August 2021.
ESA astronaut Thomas Pesquet commented on this picture: "Megan was in the Cupola when the 360 camera ISSexperience, perched at the end of the robotic arm, decided to come peek inside the ISS. It reminded me of a NASA underwater training mission, when all the fish came at night to look inside our deep sea habitat, which was the only light in the area, so it was entertainment for them: we were the aquarium!"