Since 2016, astronomers have been searching for a distant planet to explain the unique orbits of observable objects in the solar system. Do you have what it takes to find Planet X? Players take on the role of astronomers, participating in this real scientific investigation. Use the free companion app to survey for objects and take other actions. Use the app results and the logic rules to find objects, publish theories, and deduce where Planet X must be! Created for 1-4 astronomers, ages 13+, to discover in 60-75 min.