Hora and Its Use
The ecliptic is the apparent pathway of the sun in the Heavens. The planets and the other luminary moon, follow their own individual tracks which lie along the ecliptic on north and south of it. This width on either side is about 7.5 degree and hence the pathway of the planets is around 15 degree in width, having the ecliptic in its center. This is called Zodiac. If one observes, it will appear that the whole Zodiac goes round the earth once a day, i.e. once in 24 hours and the same portion of the zodiac raises in the east in 23 hours 56 minutes and few seconds. As the Zodiac is divided into 12 equal parts called solar mansion (sign or Rashi), each Division will be appearing in the east roughly for duration of 2 hours. In other words, the previous sign will appear to rise up in the heavens and the next sign will commence to rise nearly two hours after the previous sign began to rise. Hence the 12 signs rise in the east, roughly at an interval of 2 hours. The Hindu astrologers have subd...