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 ninth set, students use the mathematical constant pi to calculate the area covered by a laser used to detect frost on the Moon's surface. Materials Pi in the Sky 9: Lunar Logic worksheet – download PDF Pi in the Sky 9: Lunar Logic answer key – download PDF (also available as a te