Exploratory craft is a term used to describe a type of spacecraft designed to explore and investigate the unknown. The most common type of exploratory craft is a PROBE, which is a robotic spacecraft that is sent to collect data from distant locations. Probes are typically unmanned and can be sent to explore planets, moons, asteroids, comets, and other celestial bodies. They are equipped with instruments to measure and analyze the environment they are exploring, and can also be used to take pictures and transmit data back to Earth.