Death Star ruins

The Death Star ruins were formed from the remains of the second Death Star when the battle station was destroyed by the Alliance to Restore the Republic during the Battle of Endor in the year 4 ABY, which filled the Forest Moon of Endor's orbit with thousands of tons of debris, ranging from pebble-sized bits to 100-meter sections of space station. Though the Alliance Fleet deployed shields and tractor beams to deflect falling debris away from their strike team on the Endor, a few chunks were still able to fall to the moon's surface. However, Endor was spared any significant environmental damage and the second Death Star's remains were left to decay in the moon's vast forests, attracting historic sightseers and souvenir hunters by 6 ABY.

The agony of Emperor Palpatine's death aboard the second Death Star manifested itself as an angry clot of dark side energy staining the fabric of the Force. When in proximity to the battle station's wreckage, Force-sensitive travelers were known to have suffered blackouts and even internal bleeding when exposed to the noxious evil. Even those without sensitivity to the Force still experienced a vague tingling of dread.

Text and facts from the “Death Star ruins/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.