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The Surya Siddhanta is one of several astronomy-related Hindu texts. It represents a functional system that made reasonably accurate predictions. [14] [15] [16] The text was influential on the solar year computations of the luni-solar Hindu calendar. [17] The text was translated into Arabic and was influential in medieval Islamic geography. [18]
Ahargana - The Astronomy of the Hindu Calendar Explains the various calendric elements of the Hindu calendar by means of astronomical simulations created using Stellarium. drikPanchang, an online Hindu almanac (IAST: pañcāṅga). Stellarium, the astronomy software that was used to create the animations featured in this article.
The nirayana system is a traditional Indian system of calendrical computations in which the phenomenon of precession of equinoxes is not taken into consideration. [1] In Indian astronomy, the precession of equinoxes is called ayana-calana which literally means shifting of the solstices and so nirayana is nir- + ayana meaning without ayana. [2]
The Vikram Samvat calendar, introduced about the 12th century, counts from 56 to 57 BCE. The "Saka Era", used in some Hindu calendars and in the Indian national calendar, has its epoch near the vernal equinox of year 78. The Saptarishi calendar traditionally has its epoch at 3076 BCE. [21] J.A.B. van Buitenen (2008) reports on the calendars in ...
Among other things, the book has tables relating to the following: [2] the ending moments of tithi, and yoga; the mean longitudes of the Sun, the Moon and the five tārāgraha-s viz, Kuja (Mars), Budha (Mercury), Guru (Jupiter), Śukra (Venus) and Śani (Saturn), the mandaphala (equation of the centre) of each of the heavenly bodies,
Aryabhata's system of astronomy was called the audAyaka system, in which days are reckoned from uday, dawn at lanka or "equator". Some of his later writings on astronomy, which apparently proposed a second model (or ardha-rAtrikA, midnight) are lost but can be partly reconstructed from the discussion in Brahmagupta's Khandakhadyaka.
A page of the Sanskrit astronomical table text Mahadevi with Dipika commentary (Internet Archive). Mahādevī is a Sanskrit astronomical table text composed by the Indian astronomer-mathematician Mahādeva around the year 1316 CE.
In Indian astronomy, a karaṇa is a half of a tithi. It is the duration of time in which the difference of the longitudes of the Sun and the Moon is increased by 6 degrees. [1] [2] A lunar month has 30 tithi-s and so the number of karaṇa-s in a lunar month is 60. These sixty karaṇa-s are not individually named.