Imu and the gorosei seem to clearly represent a geocentric model of the galaxy. The earth being the center of the universe with only 5 planets orbiting
- Imu: earth
- Saturn: Saturn
- Mars: Mars
- Warcury: Mercury
- Nasjuro: Venus
- Peter: Jupiter
- Luffy: sun
- Vivi: true earth?
- Momonosuke: moon
- Carrot and the mink are connected to the moon to but eh idk
- Shirahoshi: Poseidon: Neptune
- Yamato?: Pluton: Pluto
- Lunarian/sky person?: Uranus