If you're looking for manga similar to Welcome to THE SPACE SHOW, you might like these titles.
Corona and Lan are the newest recruits in the Space Patrol, a special agency dedicated to helping those in need across the galaxy. With the help of Instructor, their alien guide, the girls are off to explore exciting new planets in search of friends in trouble!
Obi is a young jedi in training. When he and his master are on a misson to protect the Queen they have to land on the Planet of Tatooine; there they meet Anakin Skywalker, a ten year old boy who seems to have amazing Jedi reflexes.
It is the year 2045. To escape a dying Earth, mankind conducts a mass exodus to Mars. But an enemy surpassing human imagination lies in wait for them in space.
In 2755 AD, the latest model spaceship Xebec departed from the City of Nemexis in the Nemexis Star Sector. Due to an accident at the moment of its warp jump, it had to perform an emergency landing on the mysterious planet, Garaga.
Welcome to Ikkou Sahara's outrageous look at Ultra-Superheroines and Giant-Sized Monsters! Discover the origin of Silbuster, the mysterious Starlight spaceship, the trouble of keeping a not-so-secret underground hanger a secret, the disadvantages of becoming giant-sized when your clothing doesn't, and how attempting friendly dialogue with monsters can lead to mud-wrestling matches!
Wonder 3 takes place in an alternate Earth in the year 196X and the world is overrun with war and violence. The Galactic Federation consisting of all the advanced species of the universe convene to decide the future of Earth, but due to a lack of information they decide to send an elite team, Wonder 3, to observe human species for one year and determine whether or not humans are worthy of saving. Upon landing on Earth, the three members of Wonder 3 - Bokko, Nokko, and Pukko - disguise themselves as animals and come across the two Hoshi brothers who defend humanity in their own way. With a time limit of one year, what can Wonder 3 learn from the Hoshi brothers about life on Earth?
Follow the tale of an Earthling determined to find out why his home planet was destroyed...while sleeping with as many alien girls as possible. It can be pretty lonely being the only member of your species--just ask "Bub", an amnesic Earthling who woke up in outer space and discovered that Earth had been destroyed. As he travels through multiple universes, Bub must figure out his past, what happened to his home planet, and how to best pick up alien chicks--the human race won't repopulate itself, after all!