Galaxy Gun
the Galaxy Gun was the Empire's last true super weapon, designed by Umak Leth and built in the Byss drydocks after Palpatine was reborn a second time, after the Battle of Endor. The Galaxy Gun was a 7,250-meter-long cylindrical platform capable of launching intelligent projectiles into hyperspace. These "lightspeed torpedoes" could then exit hyperspace on their own, at precise coordinates. Once out of hyperspace, the projectiles could strike immediately at their targets, without any advanced warning. The Emperor managed to destroy the New Republic's base on the Pinnacle Moon of Da Soocha V with a missile from the Galaxy Gun. However, during the defense of Byss, the Galaxy Gun was rammed by the Eclispe II as it emerged from hyperspace. The Galaxy Gun fired a missile during its destruction, which exploded inside the planet Byss. Although the Galaxy Gun was equipped with a hyperdrive, it was unable to escape the gravity well of the system. The resulting explosion wiped out the Imperial fleet, including the Galaxy Gun, killing all Imperial personnel in the blast and utterly destroying Byss.