Ask the Scientist

Category Archives

Ask the Scientist: Planetary Classifications

Last mission, we visited a Class L planet. What do these classes mean?

The Federation, and Starfleet by extension, recognizes 20 distinct classes of planets. They are classed by factors such as planet age, mass, and distance from their sun, and labeled by an arbitrary alphabetic designation. Here are some of the more common classes of planets:

  • Class M – derived from the Vulcan word Minshara, these planets are among the most habitable in the galaxy. Notable examples include Earth and Vulcan
  • Class L – marginally habitable, able to support vegetation but rarely animal life
  • Class P – glaciated, habitable planets, such as Andoria
  • Class J – gas giants, like Sol VI (Saturn)
  • Class Y – also sardonically called the ‘Demon Class’, these planets are in the habitable zone of their solar systems and have comparable mass and gravity to Class M, yet are highly toxic

If you would like to learn more about Planetary Classifications, visit the wiki for more information!


We are a Star Trek roleplaying game

We are a free, fun, and friendly community of Star Trek fans who write collaborative fiction together. It’s easy to join – we’ll teach you everything you need to know!
Click here to learn more.

OOC activities

Looking for something fun to do? We have a whole list of fleet activities that are looking for members like yourself! Check out the Fleet Activity List today to see where you'll fit in.