Luna wants nothing more than to blast off into space and explore the cosmos. But how does she go from a cardboard rocket in her room to running experiments on the ISS? Enter Granny, who's about to teach Luna just how to make her dream a reality. From discovering what shooting stars are really made of and learning how to complete a spacewalk, to rocket-building lessons and space shuttle trips - Luna and her Granny are off on a fact-filled adventure learning how to become a successful astronaut.