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Kranti, the Sun's declination

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The declination of the Sun is computed by the formula Sin J = Sin L Sin w where J is the Sun's declination of that particular date and time, L is the tropical longitude of the Sun and w, the Sun's maximum declination, which is 23 degrees and 27 minutes. The Sun's maximum declination will be reached during Karkyadi ( The First Point of Cancer ) and Makaradi ( The First Point of Capricorn ). At Karkyadi, it will be +23 d 23 m and at Makaradi, it will be -23 d 27 minutes. And at Meshadi ( The First Point of Aries ) and Thuladi ( The First Point of Libra ), the solar declination will be zero. Days and nights will be of equal duration and hence they are called Equinoxes. Yada Mesha Thulayo varthathe thada ahoratranam samanani bhavanthi

Kranti, the Sun's declination

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The declination of the Sun is computed by the formula Sin J = Sin L Sin w where J is the Sun's declination of that particular date and time, L is the tropical longitude of the Sun and w, the Sun's maximum declination, which is 23 degrees and 27 minutes. The Sun's maximum declination will be reached during Karkyadi ( The First Point of Cancer ) and Makaradi ( The First Point of Capricorn ). At Karkyadi, it will be +23 d 23 m and at Makaradi, it will be -23 d 27 minutes. And at Meshadi ( The First Point of Aries ) and Thuladi ( The First Point of Libra ), the solar declination will be zero. Days and nights will be of equal duration and hence they are called Equinoxes. Yada Mesha Thulayo varthathe thada ahoratranam samanani bhavanthi

The Eccentric Theory of Indian Astronomy

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We have said in our columns that the Indian astronomers said that the planets revolve around a point different from that of the Earth and Indian Astronomy is heliocentric. The above diagram depicts the Eccentric Theory and Reduction of the longitude of the planet to the heliocentric coordinate system ( known as Manda Kriya ). In the above diagram The angle NAP = Manda Kendra or Mean Anomaly The Circle A is the mean orbit of the planet The Circle B is the true orbit The mean planet moves on the mean orbit, known as the deferent. When the planet is at N in the mean orbit, he is at M in the eccentric and this is called Mandoccha ( Aphelion ). When the planet is at R in the mean, he is at S in the eccentric. M and S correspond to Apogee and Perigee in the case of Manda Phala correction ( otherwise known as the Equation of Center ). When the planet is at M in the eccentric, the position of the true planet coincides with N, the mean planet and so the Manda Phala correction is Zero.The E

Dhoni redeems India

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A brilliant 65 not out by Dhoni saw India score 308/6. Half centuries by Mukund ( 62), Laxman ( 56) and Raina ( 50 ) saw India battle it out for supremacy and is poised to take a huge lead. Dhoni on 65 not out and Bajji on 12 were at the crease. Earlier, the West Indies fought back magnificently to reduce India to 182/5 at tea. A brilliant piece of glove by Baugh off Chanderpaul saw Laxman depart, after a well compiled 56. Laxman left a delivery outside his off stump and Baugh whipped off the bails in a flash ! Promising youngster Kohli was caught down the legside off Sammy and India lost a valuable wicket at 168. Then Bishoo dismissed Mukund, who made a good 62. Mukund was involved in a 84 run partnership with Laxman for the third wicket. India started at 8/0, but lost the wickets of Vijay and Dravid. Dravid was bowled ingloriously through the gate and Vijay dabbed at a delivery outside the offstump. Both scored five runs. India added 126 runs after tea for the loss of only Suresh Rai

Ishant & Co skittle out WI for 204

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Ishant delivered the goods again by taking 5/77 and triggered another WI collapse. WI was going great guns at 190/6, when Ishant shot out the rest. Earlier, Bajji became the 11th bowler in the world and the fourth spinner to take 400 wickets. He is the fourth spinner after Murali, Warne and Kumble. India were 8/0, and Mukund ( 6 ) and Vijay (1) were at the crease at the close of day 1. A downpour after tea curtailed play. West Indies started the day at 75/3 disastrously, as Chanderpaul edged a Munaf delivery into the safe hands of Dhoni. Then Praveen Kumar clean bowled Samuels, who left after making nine runs. Darren Bravo along with Baugh put on 29 for the sixth wicket, before Ishant removed Bravo for 50. Bajji got the WI captain Sammy caught at forward short leg by Mithun for 20 and then grabbed his 400th wicket, as he went through the defense of Baugh, who fell for a gutsy innings of 60 off 79 balls. Ishant then removed the last two WI batsmen and took 5/77, his third five wicket h

Ishant & Co skittle out WI for 204

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Ishant delivered the goods again by taking 5/77 and triggered another WI collapse. WI was going great guns at 190/6, when Ishant shot out the rest. Earlier, Bajji became the 11th bowler in the world and the fourth spinner to take 400 wickets. He is the fourth spinner after Murali, Warne and Kumble. India were 8/0, and Mukund ( 6 ) and Vijay (1) were at the crease at the close of day 1. A downpour after tea curtailed play. West Indies started the day at 75/3 disastrously, as Chanderpaul edged a Munaf delivery into the safe hands of Dhoni. Then Praveen Kumar clean bowled Samuels, who left after making nine runs. Darren Bravo along with Baugh put on 29 for the sixth wicket, before Ishant removed Bravo for 50. Bajji got the WI captain Sammy caught at forward short leg by Mithun for 20 and then grabbed his 400th wicket, as he went through the defense of Baugh, who fell for a gutsy innings of 60 off 79 balls. Ishant then removed the last two WI batsmen and took 5/77, his third five wicket h

Chara, the Ascensional Difference

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In Indian Astronomy, Chara is the Ascensional Difference and is the difference between Right Ascension and Oblique Ascension. And is calculated by the equation Sin ( Chara ) = tan ( decl ) tan ( latitude ). Here Theta is Chara. Sin C is called Chara Jya Right Ascension means the longitudes measured along the Celestial Equator, the Vishu vat Vritta. Oblique Ascension means the longitudes measured along the Ecliptic, the Kranti Vritta. Chara is used in the computation of Sunrise and Sunset. The formula for Sunrise = 6 H + Equation of Time - Chara - Refraction Correction The formula for Sunset = 18 H + Equation of Time + Chara + Refraction Correction.