Star Wars seems to have a fascination with Death Stars. The very first Star Wars movie was about the destruction of the first Death Star, then a second Death Star shows up in Return of the Jedi, The Force Awakens has its own planet destroying superweapon, and now Rogue One brings us the 4th movie about a Death Star, and the 7th movie to reference it.

It makes sense, though. The Death Star was a pretty big deal. It was ideally the final piece of Palpatine’s plan to consolidate power under himself, and it would have worked had it not been for those meddling kids!

There’s a lot to learn about the Death Star from simply watching Star Wars, but there’s more to the Death Star than just what’s in the movie. Find out what else there is to know with 15 Things You Need To Know About The Death Star.

15. The Plans Originally Came From The Separatists

Star Wars Attack of the Clones Death Star Plans Star Wars: 15 Things You Didnt Know About The Death Star

The Death Star has always been a symbol of the might and power of the Empire. After all, fans were introduced to it as a tool of the Empire during the very first Star Wars movie in 1977. Among the many things revealed by the prequels, it’s shown that the plans for the Death Star originated with the Separatist Alliance. It’s not a major plot point, but a hologram of the Death Star can be seen in the conference room on Geonosis, and Count Dooku takes the plans with him when he flees.

Dooku, of course, takes the plans to Palpatine, but it’s more than likely the dark lord already knew about them, since he was guiding the Separatists as his alter ego, Darth Sidious. More likely than not, he actually commissioned the Separatists to design the plans in the first place. Considering the Confederacy was led by various trade guilds, and the Separatists probably had the better design and manufacturing resources (their armies were all droids), taking advantage of those resources to design his superweapon fits right in line with the rest of Palpatine’s schemes.

14. Construction started during Clone Wars

Death Star Construction Star Wars: 15 Things You Didnt Know About The Death Star

Taking even more of the responsibility for the Death Star out of the hands of the Empire, it turns out construction on the project actually began in secret during the Clone Wars under the supervision of the Republic, as evidenced by one of the last shots in Revenge of the Sith. The Empire did quite a bit of work on it as well, obviously, because it inherited the project when Palpatine reformed the Republic into the Galactic Empire.

As revealed in the Rogue One prequel novel, Catalyst, even the Republic engineers planning the construction efforts aren’t sure where the plans came from. The plans mysteriously came into Republic hands after the Battle of Geonosis seen in Attack of the Clones, but the details aren’t clear. Obviously it was Palpatine’s doing, and he just shifted the plans from one hand to the other so he could ensure the survival of his pet project.