The new Canon sources have firmly set the diameter at 200km. Retcon: Legends materials originally gave the second Death Star's diameter at 160km, before this was retconned to 900km.As Luke, and then the Rebellion as a whole, learns, the second Death Star is fully armed and operational. Obfuscating Disability: It's designed to look not-quite finished, with massive gaps in the superstructure (and technically speaking, it isn't actually finished by the opening of Return of the Jedi).Deflector Shields: The new Death Star is protected by one, generated by a station on Endor.In canon, IG-88B made a similar attempt, but was thwarted by an astromech droid aboard the station. Adaptational Nonsapience: In Legends, IG-88A secretly uploaded his consciousness into the Death Star's central computer, becoming the weapon in the process, and intended to use it to instigate a droid rebellion, only to fail before he could start when the Death Star was destroyed.However, it also served another purpose which involved luring the Rebel Alliance into a battle which would annihilate them once and for all. Similar to the first Death Star, this station was designed to terrorize planets and star systems. Primarily to ensure that the individual making such a request was doing so for a good reason and not for their own personal gain.A partially complete space station that served as the successor to the original Death Star.

Though, as mentioned above, their reach is not infinite, their actions and methods are not completely without question, as any larger requests for troops and equipment would need to be cleared by the Council of Moffs. Most keep their heads down and ensure orders are followed whenever a Moff is present. To go against the Moff is to go against the Empire and the Emperor himself, and those that do usually find themselves on the receiving end of a firing squad or sent to a brutal penal colony.

Entire battlefleets, Stormtroopers in their thousands, and great wings of fighters can be dispatched with reasons known only to the Moff, with no one other than their superiors daring to question their judgment or reasoning. It takes very little for them to muster a force capable of swiftly ending any rebellion in an entire system of planets. The power of a Moff in a functioning Empire is one to be feared.

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