The "Pi in the Sky" math challenge gives students a chance to find solutions to real-world problems all while using math and pi just like NASA scientists and engineers. In this problem from the seventh installment of the set, students use the mathematical constant pi to calculate the distance across a disk of debris around the star Beta Pictoris. Materials Pi in the Sky 7: Planet Pinpointer – Download PDF Pi in the Sky 7: Planet Pinpointer answer key - Download PDF (also available as a text-onl