Originally posted by: Go-Mie
But "Canon", is something Lucas gets to decide because it's his universe.

Canon - can-on -n;

Standards accepted as axiomatic (true without having to be proven) and universally binding in a field of study or art.

Star Wars has become entirely too contaminated to have canon. Too many people have added to and altered the story over the years - particularly Lucas - for it to have any one accepted standard. Canon doesn't change just because the author goes through a divorce, has an argument with someone, becomes wealthy, has children, has writer's block, gets remarried, has an idea for a marketing tie-in, gets some new computer software, or any other of a myriad of reasons why they might want to change something 20 years later and then lie about it.

Star Trek has canon because there have been groups of people collaborating and providing a series of checks and balances when they decide storylines and films. They stay true to principals laid out in years past.

Star Wars films, on the other hand, are controlled by a single individual - power unchecked - who seems to change his mind and his stories every time something happens to him personally or whenever he gets a good idea for a toy, or can't come up with a story arc, etc.