Aeten II Aeten II was a planet located in Wild Space , on the borders of the Outer Rim Territories . The planet was known primarily for its Stygium crystals , which could be used to create cloaking devices or as lightsaber crystals which gave a Jedi increased stealth and dexterity . The planet was destroyed in 3 ABY , shortly following the Battle of Hoth , by Imperial Grand Admiral Martio Batch , using the " Tarkin " superweapon . History . During the time of the Cold War between the Sith Empire and Galactic Republic , the planet Aeten II , located in Wild Space , was represented in the Rift Alliance by the Sullustan Diab Duin . The Sith Empire established a space station in the planet ' s orbit . Near the end of the Cold War , two Imperial traitors infiltrated the Sith Empire ' s space station and disabled its defenses . The agents were eventually neutralized , though their efforts left the station defenseless ; this allowed a Republic fleet to attack and capture the station . Aeten II was later settled by the Galactic Republic , circa 1000 BBY . Eventually , the new inhabitants discovered the vast resources of stygium within the planet and rapidly built mines to extract the valuable mineral . In 22 BBY however , shortly before the Clone Wars , the Galactic Senate passed a law restricting the export of stygium crystals , although the supply of crystals had utterly came to a halt due to the over - mining of reckless profiteers . Nonetheless , prospectors found new resources to mine . During the last year of the Clone Wars , Aeten II was the site of the month - long Battle of Dreighton . Both the Galactic Republic , aided by the Pendarran Warriors , and the Confederacy of Independent Systems wished to capture the planet so that they could gain a significant advantage in the use of cloaking technology . Once the two factions attacked one another , however , Hutt and Black Sun forces entered the system and destroyed the remainders of all three fleets . It is believed that the Dreighton Nebula itself eventually annihilated all combatants . Whatever occurred there , it would soon be declared that there were no more stygium caches on Aeten II . The aftermath of the battle also had many rumors about the nebula being haunted afterwards with ghost ship s and the dead pilots of the battle , giving birth to the idea of the Dreighton Triangle . This was ratified by strange disappearances of ships flying in the nebula . During the Galactic Civil War , after the destruction of the first Death Star , Grand Admiral Martio Batch , wishing to recreate cloaking devices like the one used in the Sith Infiltrator , brought the " Tarkin " to Aeten II , where the Stygium mines had dried up . The Admiral then used the " Tarkin " to destroy the planet and used the large supply of previously unreachable crystals to forward the Phantom TIE project . The planet stayed intact and habitable but had gashes leading to the core . It was in orbit of the ruins of Aeten II that the " Executor " - class Star Dreadnought " Terror " , under Admiral Sarn , protected the crystal supply . His plan eventually failed when Rebel saboteurs Rookie One and Ru Murleen destroyed the " Terror " , the corresponding TIE Phantom factory on Imdaar Alpha and all the TIE Phantoms . Behind the scenes . Aeten II is present in the " Empire at War " story campaign , but not in the " Forces of Corruption " story campaign . This is consistent with the planet ' s destruction by the Tarkin superweapon after the Battle of Yavin . However , the planet appears in " Forces of Corruption ' s " galactic conquest mode unchanged , which is acceptable because this game mode is not meant to be taken as canon . The " " and " The Complete Star Wars Encyclopedia " incorrectly place Aeten II in the Outer Rim Territories . " The Essential Atlas " has eventually stated that the system is in Wild Space . Some of the mission text for the Aeten Defense space mission in " " mistakenly refers to the planet as Aeten Ten , while other instances in the text files correctly name it as Aeten II .