Snapchat’s Friend Solar System is a feature within Snapchat Plus that ranks your closest friends using a planetary theme. Your top eight best friends are assigned different planets, with the closest friend being the "Sun" and others following in order based on their level of interaction with you. The order typically follows the actual solar system: Mercury (closest), Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune (farthest). Each planet has unique characteristics that symbolize your interaction with that friend, such as frequent chats, snaps here https://snapchatplanetorder.com/, or shared moments. This feature adds a fun and visually engaging way to see who you interact with the most on the platform.