Oh I don't know. Let's see:
During the contract between Lelouch and C.C. we see Jupiter. It appears when he regains his memories. It appears during the scene between Charles and V.V., it appears during Suzaku's mindrape in season 1. It appears in Season 1 and 2's opening, it appears during the thought trap in 25 and Akasha is connect to Jupiter thanks to it being Sanskrit for aether and etc.