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 set , students use the mathematical constant pi and Kepler's third law to find out when a Saturn orbiter will make its mission-ending plunge into the ringed planet. Materials Pi in the Sky 4: Finale Fanfare worksheet – download PDF Pi in the Sky 4 answer key (third problem) – dow