Class M
Classification
Class M - Terrestrial
Age
3-10 billion years
Diameter
10,000 - 15,000 km
Location
Ecosphere
Surface
Surface water abundant; if water or ice covers more than 80% of surface, planet is considered Class O - Pelagic or Class P - Glaciated
Atmosphere
Nitrogen, oxygen, trace elements
Life-forms
Extensive vegetation, animal life, humanoids
Example
Earth (Sol III), Vulcan (40 Eridani A), Cardassia Prime (Cardassia VI)