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 data from the Kepler space telescope to find the size of a planet outside our solar system. Materials Pi in the Sky 5: Solar Sleuth worksheet – Download PDF Pi in the Sky 5 answer key – Download PDF Background The centuries-old