In the fifth installment of the NASA Pi Day Challenge, students 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 and study an interstellar object detected in our solar system.
› See how many 'Pi in the Sky' puzzlers you can solve!
› Related lessons and resources for educators
› Read about the science behind the challenge