Definition of Koch

Pronounced ‘coke,’ this is one of the popular house systems used when casting an astrology chart. Considering how old astrology is, this is a fairly new addition to the house systems, making an appearance in the mid-1900s. Accurate time and place of birth are needed to use this method of placing the houses in the astrology chart.



An ephemeris is a map of the planets. Because the planets are in constant motion, that map is going to change constantly. Ephemerides come in either midnight or noon versions, and show you where the planets are (or were for a date in the past or will be for a date in the future) at either midnight or noon GMT.

Read the full Ephemeris definition