Pseudoscience that supposes a relationship between the position of planets and stars with the destiny of people, nations, institutions. Originally it had scientific rank, calculating syldereal and astronomical times, but associated with the divination of the future, which in many cases served to finance more serious studies; although with the advancement of technologies both branches were divided taking the name of science the name of astronomy, which until the Middle Ages was a synonym. While Spanish comes through Latin, the origin is Greek by 945; 963; 964; 951; 961; ( aster "star , star" ) 955; 959; 947; 953; 945; ( lodge "knowledge") .