Snap Planetsare part of Snapchat’s Friend Solar System feature, which represents how close you are to another friend based on interaction.
The different planets correspond to positions in a person’s Best Friends list, with each position represented by a different planet.
Your position can change as your interactions, such as chats and snaps, change over time.
The feature is mainly a visual way to understand friendship rankings rather than a permanent status.
Have you noticed your planet position changing as you interact more with someone?