Habitability and Affinity

The habitability score for a given world is a summary of all the factors that make the world pleasant for race to live on. Habitability runs from -2 to 8, with higher scores indicating a more pleasant environment. 
The Affinity score is a number between -5 and 10 and determined by add the Resource Value Modifier to the habitability score.
*Atmosphere: The most critical part and makes up half of the 8 for humans.
*Hydrographic Coverage: 25% of the 8 for humans
*Climate: 25% of the 8 for humans; only applies to Breathable atmospheres
==Notes ==
The base line is for humans and while most races may have the same score as human these three categories may change. The old EC Weird Science, Weird Fantasy, and Weird Science-Fantasy comics are a treasure trove of ideas that relate to these two factors. Some examples:
*Fish Story in Weird Science-Fantasy #23/#1 (September-October 1953) describes a fish people on dying ocean world who find a spacecraft from Earth. After drowning the crew they repurpose the ship to return to Earth planning to eventually conquer it. They land in Atlantic ocean and open the hatch. The humans of Earth find their remains - turns out they were fresh water fish.
*Adaptabilityin Weird Science-Fantasy #27 (Feb 1954) suggested that the occupants of a multi-generational colony ship could become so conditioned to their mechanical scientifically-controlled life to the point that they would not be able to survive on any world.
==References ==
*GURPS Space pg 88-89
Category:Other Planets