BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
Featuring a spectacular pop-up on every spread, The Death Star takes you into the secret chambers of the Empire's most devastating weapon as it hurtles through space on its mission of destruction.