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 B
Class C
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 N
Class P
(Star Charts unless otherwise referenced)