Enjoy this video activity for teachers, students, parents and people of all ages. Imagine if you could use the stars in the sky to actually sail 2,400 nautical miles across open ocean from Hawaii to find an island called Tahiti, which is smaller than Maui, and then turn around and come back. In honor of Earth Day and this season of voyaging when the stars are aligned perfectly, traditional wayfinder Nainoa Thompson shares a lesson in celestial navigation that you can do in your own backyard.