It's been almost 50 years since Star Wars made its cinematic debut, and it's still widely considered to be one of the biggest entertainment franchises on the planet. That popularity is in no small part due to the original trilogy's excellent world-building, which introduced a variety of alien species and referenced past events that in turn made the Star Wars galaxy feel expansive and lived-in. Naturally, Star Wars' expansive galaxy left plenty of room for prequels, sequels, and spinoffs.