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Indian astrology is vedic.It consists of nine planets,twelve zodiacal signs,twenty seven constellations as its basic foundation.The planets are listed as sun, moon, mars,mercury,jupiter,venus,saturn,rahu and ketu.Twelve zodiacal signs are aries(mesh),tauras(vrikh),gemini(mithun),cancer(karkat),leo(singhm),virgo(kanya)libra(tula),scorpion(vrischik),saggitarius(dhanush),capricorn(makar),aquarius(kumbh),pisces(meena).Twenty seven constellatins are ashwini, bharani, kritika, rohini, mrigshirsha, ardra, punarvasu,pushya,ashlesha, magha,purva phalguni, uttar phalguni, hasta,chitra, swati,vishaka, anuradha, jyestha, mula, purvashadha,uttarashadha, shravana, dhanistha, shatbhisha ,purvabhadrapada ,uttarbhadrapada,revati.

A birth chart is divided into twelve parts which are called "Houses".Twelve zodiac signs are placed in these houses. starting point is decided as per the time of the birth .The sign arising in the eastern horizion at the time of birth is called the ascendant sign and placed at the top of the horoscope and subsequent signs are placed in onward houses which are termed as1st,2nd,3rd,4th,5th,6th,7th,8th,9th,10th,11th,and12th respecti
Assessment of horoscope and prediction thereof  is based on placement of  planets in different signs and constellations which are again placed in 12 houses.
To judge a horoscope one must first of all learn the significance and meaning of planets,signs and houses, which we are going to describe in detail herewith.
Indian calendar(vedic astrology) is called PANCHANG.It means a calendar (ephemeris) has five(panch) ang(constituents) .These are 1.day of the week, 2.lunar day from1-15(15 for dark half and 15 for bright half),3.Nakshatra(27 constellations)...,4 .yoga(27 yogas are obtained by addition of degrees of Sun and Moon) and lastly karan (1/2 of a lunar day). These are useful for electional astrology where we wish to know the most auspicious time for the commencement of a new task or enterprise.Year was started by the king Vikramaditya 2067 years ago .This year is most popular ,though there are many others much less popular.