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.
"THE ESCAPE" PART FOUR! LUKE, LEIA and HAN remain stranded on the isolated moon of Hubin and out of the fight against the Empire. Who says they even WANT to leave? But their hideaway may not be so secret…especially for old foes hot on the rebels' trail.