George Lucas gav " Göra Star Wars - The Final Story Behind the Original Film" faktaboken. några ytterligare (om än nu icke-kanon) detalj om den galaktiska senaten:
LEIA ON THE HISTORY OF THE EMPIRE "In the Old Republic, all the systems sent their representatives to the Senate. It wasn't an Imperial Senate; it was a Republican Senate, which made the decisions that controlled the Republic. There were 24,372 systems in the Galactic Senate. The Senate would vote in a Chancellor or an overseer who would work for four years as the leader of the executive branch of the Republic. You were only supposed to be able to run for one four-year term — you were only eligible for one term.”
Eftersom Republiken " Grand Convocation Chamber " bara sitter 1024, står det att en stor del av system i republiken väljer att dela representation med andra system. Det här numret tycks inte innehålla vad som förmodligen skulle vara ett stort antal befolkade månar, asteroider och planetkolonier som representeras av sina hemplaneter.