Designed to explore caves on the Moon, the 46-cm diameter sphere would carry an immersive stereoscopic camera, a ‘laser radar’ lidar system for 3D mapping of cave interiors, temperature sensors and a radiation dosimeter, as well as extendible arms to help clear obstacles and test rock properties. It would first be lowered into the cave mouth on a long tether, then disconnect to roll away autonomously under its own power. The hanging tether would then double as a Wi-Fi receiver, allowing DAEDALUS to relay its findings out of the pit.