Ages are wierd throughout the 6 movies. Anakin is young compared to Padme at the start but quickly gets of age while she does not turn into a cougar. Obi-Wan also does not age during this time. Anakin becomes Darth. Luke and Leah are born, share some inapropriate brother sister kisses and don't really seem the same age. Obi-Wan suddenly ages a lot in the 20 years or so of Luke's life.