They used this system to make advanced astronomical calculations, including highly accurate calculations of the length of the solar year and the orbit of Venus.
42.
In fact, more than 1, 000 years ago Egypt's then Fatimid rulers decided that astronomical calculations should be used to determine the start of Ramadan.
43.
One of this book's achievements was pointing out many reasons, some quite subtle, why telescopes could not be reliably pointed using only basic astronomical calculations.
44.
The jantars have evocative names like Samrat Yantra, Jai Prakash, Ram Yantra and Niyati Chakra; each of which are used to for various astronomical calculations.
45.
To further support this plea, Banneker included within the letter a handwritten manuscript of an almanac for 1792 containing his ephemeris with his astronomical calculations.
46.
His chronology and astronomical calculations have been opposed by several Indologists ( such as Michael Witzel ) and Western historians ( such as Kim Pfloker ),.
47.
Fatimid Dawoodi Bohra follow the tabular Islamic calendar ( see section below ) prepared on the basis of astronomical calculations from the days of Fatimid imams.
48.
Where Christian and Jewish calendars are based on astronomical calculations, the Muslim month officially begins with the visual sighting of the new crescent moon, Islam's symbol.
49.
The value of 24, 000 years fits relatively close with the modern astronomical calculation of one full precession of the equinox, which takes 25, 772 years.
50.
The following example taken from " Laghubhskar + ya " of Bhaskara I illustrates how the Kuttaka algorithm was used in the astronomical calculations in India.
