The order of planets in Snapchat is always the same as the real solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. The placement of friends, however, depends on interaction. This means that
Snapchat planets in order reflects your top friend on Mercury, your second on Venus, and so on. The sequence of planets remains fixed, but which friends appear on them can change over time based on how often you chat, snap, or maintain streaks.