The International Astronomical Union had standardised all the constellations of the Sidereal Zodiac and the exact boundaries fixed in 1930. . But none of the Indian names figure in the list of the IAU, despite the fact that India had one of the earliest astronomical cultures.
That the ancient Babylonians, the Hindus and the Egyptians had deep and independent knowlege of the Heavens is an undisputed fact. The names of fabled heroes, animals and deities were assigned to the constellations. Those who followed the ” Star of Bethlehem” had come from these pagan cultures. The ascendency of Sirius marked the resuscitation of the Nile, after a long dry spell.Edava Pathi transformed the hot, parched landscape of Kerala into a lush green Paradise, a tropical wet system, as per the German climatologist Koppen !
The Indian system is far more comprehensive. It deals with the Sidereal Zodiac, which begins from 0 degrees of Beta Arietis ( Aswini ) and ends at the 360th degree of Zeta Piscium ( Revathi ). As the Sun moves roughly one degree per day, the solar transit of a 30 degree Sign is 30 days and a constellation is 13.33 days ( as the constellation is 13 degrees and 20 minutes ). A Njattuvela is a solar transit of a constellation of 13 degrees 20 minutes and hence the duration is 13.33 days.
The Malayalam Era is known as Kolla Varsham and it was compiled by a man from Kollam. It is derived from the Ursa Major Cycle ( The Saptharshi Yuga ). Staying in a constellation for 100 years, the Ursa Major makes a retrograde circuit of the Zodiac, known as the Ursa Major Cycle. Hence the Ursa Major Cycle is 2700 years ( 27*100).
All other calenders deal only with the 12 signs of the Tropical Zodiac and hence is superficial.
The book “The Farmer’s Song’ , Krishi Geetha deals with the effects of the solar transits of constellatons. Legend has it that Parasurama, one of the ten incarnations of the Lord, after destroying the tyrants, was seized with remorse. In order to expiate for his sins, he distributed the lands he had conquered to spiritual people. In higher states of Consciousness, he received higher instructions how to make the land fertile, how to plant, when to plant and when to reap, according to the solar transits. The result of his great pyshic research was ‘ The Farmer’s Song” , the Krishi Geetha. This is a revealed science, like allVedic sciences.
The Fivefold Ephemeris, the Panchanga
The Ephemeris is fivefold
Vaara, Day of the Week, named after the Seven Revolving Heavens
Thaara, the Star, the lunar transit of a constellation
Thidhi, the Lunation, 12 degrees
Karana, 6 degrees or Half Lunation
Nithya Yoga, longitude of Sun + longitude of Moon
Those who follow Astrology follow the Panchanga, which gives all astro information. For corporate merges, weddings and other auspicious events, thePanchanga is used. The Panchangas use the Indian calculation of Nazhikas ( 24 minutes ) and Vinazhikas ( 24 seconds ). The Zodiac Software converts theseNazhikas into hours and minutes.
Thaara is the Lunar transit of a constellation while Njattuvela is the solar. The Panchanga and the Astro Calender gives all info about these transits.
The six Seasons of the Astro Calender are Vasanta ( Aries, Taurus), Greeshma ( Gemini, Cancer ), Varsha ( Leo, Virgo ), Sharat ( Libra, Scorpio ), Hemanta ( Sagittarius, Capricorn) and Sisira ( Aquarius, Pisces ). Thau Dau Rithu – Two months make a Rithu or a season.
During Makam Njattuvela, Sesame can be planted ( Maghathinte mukhathu ellu erinjal kutathinte mukhathu kaanaam )
Never plant anything during Pooyam Njattuvela ( Pooyathil nattal puzhuthu pokum ).
For planting all , Aswathi Njattuvela is good.
For mango trees, Bharani Njattuvela is best.
Thiruvathira Njattuvela is the most famous. It is known for vegetative propagation.
Rohini Njattuvela is good for trees.
Atham Njattuvela is good for bananas.
The Zodiac Software computes all these transits. We had given the formulae for generating the Panchanga and the Astro Calender.