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Terran Prime

Designation used in astrographical surveys of unpopulated regions. These worlds are similar to Terra, and as such are much prized as possible habitations. To be classed as such, the following must be true: Diameter 8640 to 15200 km, atmosphere 4 to 9, hydrographic percentage 36 to 95%, gravity 0.6 to 1.1g. Within this is the category Terra Norm (diameter 9440 to 15200 km, atmosphere 6 or 7, hydrographic percentage 46 to 75, and gravity 0.75 to 1.1g), a classification which almost guarantees successful colonization.