The Planet Classification System was developed by the Federation as a means of conveniently categorizing planets using a uniform criteria consisting of a number of elements including, but not limited to: atmospheric composition, age, surface temperature, size, and the presence of life. The system uses the Terran alphabet, more specifically the Latin alphabet to designate the different planetary classes.
Planetary classes
- Class A Geothermal (Gothos)
- Class B Geomorteus (Mercury)
- Class C Geoinactive (Psi 2000)
- Class D Asteroid/Moon (Luna)
- Class E Geoplastic (Excalbia)
- Class F Geometallic (Janus VI)
- Class G Geocrystaline (Delta Vega)
- Class H Desert (Rigel XII)
- Class I Gas Supergiant (Q'tahL)
- Class J Gas Giant (Jupiter)
- Class K Adaptable (Mars)
- Class L Marginal (Indri VIII)
- Class M Terrestrial (Earth)
- Class N Reducing (Venus)
- Class O Pelagic (Argo)
- Class P Glaciated (Breen)
- Class Q Variable (Genesis Planet)
- Class R Rogue (Dakala)
- Class S and T Ultragiants
- Class X, Y and Z Demon (Tholian homeworld (Class Y))
External links
- Planetary classification article at Memory Alpha, the canon Star Trek wiki.
- Planetary classification article at Memory Beta, the non-canon Star Trek wiki.