Angry Birds Star Wars Bonus Level #5 (S-5) is unlocked by accumulating 250 stars through gameplay in Star Wars. Once you have accomplished this task, you will be prompted and can either navigate directly to the level or access it via the Bonus Episode. Fling C-3PO into one of the trios of asteroids, triggering the explosion to push them into the larger gravitational field. With a little luck, the Oink Fighters will explode in a domino-like fashion, clearing the level.
Go back to the Complete Star Wars Golden Droids & Bonus Level Guide. If you have a different strategy feel free to leave a comment below; however, don't just post your score via the comments, as that's what the leaderboards are for.