Planetarium Chibi Maruko-chan: Soredemo Chikyuu wa Mawatteiru

Maruko becomes curious about a question that once changed humanity's view of the heavens: does the Earth really move? Her simple doubt opens a path through old ideas about the universe and the discoveries that challenged them.

As she learns about Copernicus, Galileo, and the changing models of the sky, Maruko sees how observation and courage can overturn beliefs that once seemed unquestionable. A visit filled with stars and science turns the motion of Earth into a story of people who dared to look at the same sky differently.