Rising – Setting Line

Vyaasaardha vrutthe antharam ethayo:

syaaccharaardha jeevaa parapoorvayosthath agraagrayoryad

harijenibaddham soothram grahaanaam udayaastha samjnam

  The arcual distance between the six o’clock circle and the horizon measure, along the R circle trijyavrutta known as great circle of the celestial sphere, supposed to be of radius 3438’ (minute of angle) is the charardhajya. It is called the R sine of the Ascensional difference. A thread tied to the extremities of the agra on the eastern and western halves of the horizon is called the udayaastasutra. (In moderen astronomy it is known as the rising – setting line of planets).]]>

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