Short answers, pulled from the story.
George Lucas began developing what would become Star Wars in the early 1970s while seeking to construct a large-scale narrative that drew on historical models and elements of classical mythology rather than contemporary science fiction convention.
The Galaxy in Star Wars is depicted as a barred spiral galaxy estimated to span over 120,000 light-years in diameter, comprising millions of habitable star systems.
Southern Tunisia's semi-arid and desert climate provided a suitable environment for filming, representing the planet's harsh conditions. The film sets have since become notable cultural landmarks in Tunisia.
Wookiees are a sentient species native to the forested planet Kashyyyk, located in the Mid Rim region of the galaxy. Characterized by their tall, muscular build and dense fur covering their bodies, Wookiees possess notable physical strength and agility.
In 2014, Lucasfilm rebranded the Expanded Universe as Star Wars Legends, designating those works as non-canonical following Disney's 2012 acquisition of Lucasfilm.