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)