It's a particularly hot sunny day, the sun is shining bright in the sky, which gets Jupiter wondering... What do you call people who are born on the Planet Sun? Planet Sun? Luna's pretty sure the sun isn't a planet, but then what is it? Edson's model of the solar system raises a few more questions and they decide the only way to answer their questions is in another sun-tastic make believe!! Educational Objective: Discover that the sun is not a planet but a star.