Planetary Classification

Facts

• Planetary classification system established by mid-23rd century
• Descends from similar classification systems established by Vulcan Science Directorate, UESPA (ENT, TOS)

Classifications

Class D

• Terrestrial
• Airless body, often an asteroid or moon

Class J

• Gas giant

Class L

• Terrestrial
• Barely habitable or habitable with minimal technological aid
  • Often pre-terraforming state

Class M

• Terrestrial
• Previously known as Minshara-class by Vulcan Science Directorate, Earth-type by UESPA (ENT, TOS)
• Significant surface water, below 80% coverage
• Atmosphere consisting of nitrogen, oxygen, trace elements
• Habitable by humanoid life
• Subdivided into type 1-4, indicating most to least suitable for humanoid life (TNG: "The Bonding")

Class P

(Star Charts unless otherwise referenced)