HIndu Astrology Consultancy Research & Software
Science of the Albsolute and other Liberating Arts & Sciences Eighteen
When the western astronomers defined a day as 24 hours, Indians defined it as 60 Nazhikas.
The Sexagesimal Division of Day, DIna Shashtiamsa !
For, we find that
1 degree = 60 mins
1 min =60 seconds.
Same, in time computation.
A Nazhika is 24 mins And 60 Nazhikas constitute a day
It is called Equinox, nox noctis meaning NIght. As Daily Duration varies along with Nocturnal Duration, only 2 days, Mar 21 and Sept 22 are Equinoctical.
Yadha Mesha Thulayo Vartate, Thadha Ahoratranam Samanani Bhavanti.
On those days, the Celestial Equator, Vishuvat Vritta, intersects the Kranti Vritta, the Slanted Circle, the Ecliptic.
The Rishies encountered a lot of difficulties while computing, Ascensional Difference, Equation of Time, Angle of Solar Declination and Refraction, the four intervening variables which intermediate in the causal equation while counting Sunrise ( upon which entire Vedic Astrology is founded ) were all difficult to compute. So they recommended Tables to students.
If 360 degrees = 24 Houra
360/24 = 15 degrees = 1 Hour, Ardha Rasi Bhaveth Hora
A Zodiacal Sign is a Rasi of 30 degrees each and there are 12 Rasis in the Dwadasa Rasyatmaka Jagat, the Tropical Zodiac, and hence half a house is Hora or Hour
Horeti Lagnam Bhavanasya chardham.
If 15 degrees =1 Hour = 60 minutes,
then, I degree = 4 minutes !
The Science of Time, Hora Sastra, was born