Cosmo and the Lost Star Map:

Cosmo is a space-obsessed little boy who one morning discovers a tiny silver rocket in his garden with a note calling him on a mission. He blasts off into the galaxy to find five missing pieces of the Star Map — the guide that keeps the entire galaxy lit. Planet by planet, he meets Beep, a friendly robot on an icy ringed planet, and Grumble, a lonely rock creature on a dusty red world who just needed someone to invite him along. After braving cloud planets and cosmic mysteries, Cosmo discovers the final piece was inside his rocket all along — and saves the galaxy with the help of his brand new friends.