Hoshi o Katta Hi

 is a Japanese animated short film directed by Hayao Miyazaki and released January 3, 2006. It was produced by Toshio Suzuki for Studio Ghibli for their exclusive use in the Saturn Theatre at the Ghibli Museum in Mitaka, Tokyo. The film is based on a story by Naohisa Inoue.
Plot.
A boy named Nono, living on the countryside, is making a living by selling vegetables in the city nearby. One day two strangers approach him to offer him a gem which looks a flower seed for his produce. He accepts the trade and at home he plants the seed inside a small pot. Soon a tiny planet emerges, so he continues to tend after the planet and a few days later three moons are circling around the tiny planet. Once again Nono had to leave the countryside to sells his produce and again meets the two strangers who have a final request for him.