The "Pi in the Sky" math challenge gives students a chance to take part in recent discoveries and upcoming celestial events, all while using math and pi just like NASA scientists and engineers. In this problem from the 11th set, students use pi to determine how far a team of rovers drive on the Moon. Materials Pi in the Sky 11: Moon Mappers worksheet – download PDF (for best results, download and print from Adobe Reader) Pi in the Sky 11: Moon Mappers answer key – download PDF Background Engine