Autonomous spacecraft are vehicles designed to operate in space without direct human control. They use advanced technology, including sensors and artificial intelligence, to navigate, make decisions, and perform tasks independently. This capability allows them to explore distant planets, moons, and asteroids, gathering valuable data for scientists. These spacecraft can communicate with mission control on Earth, sending back information and receiving updates. Examples of autonomous spacecraft include the Mars rovers, which explore the Martian surface, and the Voyager probes, which have traveled beyond our solar system. Their autonomy enhances efficiency and safety in space exploration.