ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

344 BRAHMAGUPTA AND ASTRONOMICAL INSTRUMENTS some other proposed object; and to bring the moveable circle of declination over it. The distance in degrees, from the inter- section of this circle and ecliptic, to the end of Mīna or Pisces, is its longitude (dhruvaka) in degrees; and the number of degrees on the moveable circle of declination, from the same intersection to the place of the star, is its latitude (vikṣepa) North or South. The commentators have rightly remarked that the 'latitude so found is sphuṭa or apparent, being the place intercepted bet- ween the star and the ecliptic, on a circle passing through the poles; but the true latitude (asphuṭa) is found on a circle hung upon the poles of the celestial sphere as directed in another place". (From Colebrooke's Paper on the Indian and Arabian Divisions of the Zodiac. Miscellaneous Essays, Vol. II, 324-326). For the details of the Golayantra, readers are requested to refer to the description in the Siddhānta-Śiromaṇi of Bhās- kara II. —: o :— Reference Brahmagupta : yantrādhyāya in —BrSpSi. K.S. Shukla : The Mahābhāskarīya. Bhāskara I : Commentary on the Āryabhaṭīya. Paramādīśvara : Bhaṭadīpikā, a commentary on the Āryabhaṭīya, H.T. Colebrooke : Miscellaneous Essays, Vol. II., 1872.