The Smurfs #7: The Astrosmurf - Peyo

When Smurf wants to travel to outer space, he tries to build a rocketship, but it fails to get off the ground and he grows depressed. Papa Smurf and the other Smurfs make a plan to cheer him up. When Smurf wants to travel to outer space, he tries to build a rocketship, but it fails to get off the ground and he grows depressed. Papa Smurf and the other Smurfs make a plan to cheer him up: putting him to sleep and waking him up in an elaborately staged planet filled by other Smurfs pretending to be aliens!