In the fifth installment of this illustrated problem set, students use the mathematical constant pi to solve real-world science and engineering problems. Students will use pi to reveal the size of a planet outside our solar system, find out how much helium is raining out from Jupiter's cloud tops, locate a seismic event on Mars called a "marsquake," and study an interstellar object detected in our solar system. Materials Pi in the Sky 5 poster - download PDF Pi in the Sky 5 handouts - download