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Erschienen in:
2008 | OriginalPaper | Buchkapitel
Computation of Planets
verfasst von : K. V. Sarma, K. Ramasubramanian, M. D. Srinivas, M. S. Sriram
Erschienen in: Gaṇita-Yukti-Bhāṣā (Rationales in Mathematical Astronomy) of Jyeṣṭhadeva
Verlag: Hindustan Book Agency
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Now, all planets move in circular orbits. The number of degrees which each planet moves in its orbit in the course of a day is fixed. There again, the number of yojana-s moved per day is the same for all planets. For planets which move along smaller orbits, the circle would be completed in a shorter time. For those which move along larger orbits, the circle would be completed only in a longer period. For instance, the Moon would have completely moved through the twelve signs in 28 days, while Saturn will complete it only in 30 years. The length of time taken is proportional to the size of the orbit. The completion of the motion of a planet once in its orbit is called a bhagaṇa of that planet. The number of times that a planet completes its orbit during a catur-yuga is called its yuga-bhagaṇa (revolutions per aeon).