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  Planet Classes
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Source: Worlds of the federation
 
Class   Description        Example
 A       "failed star"      Jupiter
 B       non-radiant        Neptune
 C       Very Hot           Venus
 D       Asteroids          Ceres
 E       Large Molten core  Janus VI
 F       young              Delta-Vega
 G       desert
 H       silicate, geologically active
 I       small, young
 J       moons              Luna
 K       adaptable          Mars
 L       geologically Inactive
 M       oxidizing          Terra
 N       ocean planet

Curtosy of Mike G. Balsom. ( CEO of the USS HOOD. )