Nabagraha Shanti Vidhi
Astrology is the study of the movements and relative positions of celestial objects as a means for diving information about human affairs and terrestrial events -Wiki. Astrology is called a part of Veda. It is 5th part of Veda. As per Hindu shastra/scriptures we come to know that in real we had 4 ages(yuga) like Satya yuga,Treta yuga, Dwapara yuga and Kaliyug.