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 how far the TESS spacecraft travels as it sends data to Earth. Materials Pi in the Sky 9: Telescope Tango worksheet – download PDF Pi in the Sky 9: Telescope Tango answer key – download PDF (also available as a tex