So, Alderaan is apparently Swiss Alps-world. I guess it was inevitable at this point of the six-movie series, since we hadn't seen any mountains anywhere else before.

Transcript

GM: Okay everyone, we're done here, come back from the kitchen.
R2-D2: —and I really had to brush up on my soldering skills.
Yoda: Cool! Can you teach me?
Obi-Wan: {aside} Right... I know what I have to do.
GM: Ahem. Bail Organa heads back to his home planet of Alderaan.
Bail Organa: Hey moon flower. You like orphans, right?
Breha Moon-Flower: She's a beautiful princess!