Article ID: CBB491708035

The concepts of deśāntara and yojana in Indian astronomy (2019)

unapi

In this paper we discuss in detail the concepts of (i) the deśāntara correction to the mean longitude of a heavenly body, and (ii) the linear distance, called yojana. We consider the definitions and procedures given in classical Indian astronomical texts like the rybhaṭīyam, Brāhmasphutasiddhānta, Khandakhādyaka, Laghu- Mahā- Bhāskarīya, Siddhānta Śiromani, GrahalĀghavam and Tantrasangraha. From our findings we notice that there were apparently two distinct schools (paksas), which were led by Ārybhata (b. CE 476) and Brahmagupta (ca. 628), who used 1050 and 1581 yojana, respectively, for the diameter of the Earth.

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Authors & Contributors
Venugopal, Padmaja
Rupa, K.
Pai, Venketeswara
Balachandra Rao, S.
Uma, S. K.
Shylaja, B. S.
Journals
Journal of Astronomical History and Heritage
Sciamvs: Sources and Commentaries in Exact Sciences
Archive for History of Exact Sciences
Science and Education
Journal of the American Oriental Society
Indian Journal of History of Science
Publishers
Navakarnataka Publications
Hindustan Book Agency
Concepts
Astronomy
Celestial mechanics
Astronomical distances
Mathematics
Eclipses; transits; occultations; conjunctions
Celestial maps; star catalogs
People
Brahmagupta
Ptolemy
Graaf, Abraham de
Aristarchus, of Samos
Wales, William
Somayaji, Nīlakaṇṭha
Time Periods
Medieval
Ancient
18th century
17th century
16th century
14th century
Places
India
Greece
Arctic regions
Great Britain
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