JyotishSashtra
In Vedas, JyotishSashtra is descrided as "third eye" in which there is an unification of all Tenses (Past, Present & Future).
Therefore Jyotish may be regarded as 'Astrology', We have certain rules, Principles etc and each and every step taken is very much systematic so, It is a science.Art is a way of doing work with experience and dexterity.