h1. Planets Earth-like planets are extraordinarily rare. Playable empires start from planets semi-terraformed by ancient colony ships and kinda livable. Planets have a number of characteristics that affect their potential in various areas. Various hazards that affect people living on a planet are affecting the price of planetary "insurance":economics#Insurance. Net income (profit minus insurance) is one of the main driving forces of migration. h2. Cosmic Rays * Cosmic rays damage life and machines alike. * Spinning cores protect from them. * Basic cosmic ray level is 1. Stars add more. 1 level adds 1 EC to the cost of insurance. * Clamped in [0, infinity]. h2. Core Spin Speed * Spinning planet cores provide electromagnetic field that protects population from cosmic rays. * 1 Core Spin Speed = -1 effective Cosmic Ray Intensity and +1 Atmosphere Bio Quality capacity * Clamped in [0, 2]. h2. Surface Bio Quality * Compatibility of the surface with terran life. * For every 1 Surface Bio Quality below 1, 1 EC is added to the cost of insurance * Clamped in [-5, 1]. h2. Atmosphere Bio Quality * Compatibility of the atmosphere with terran life. * For every 1 Atmosphere Bio Quality below 1, 1 EC is added to the cost of insurance * Clamped in [-5, 1].