The Solar Year Calculated


بِسۡمِ ٱللهِ ٱلرَّحۡمَـٰنِ ٱلرَّحِيمِ

In the early 900s, Imam Abu ‘Abdullah Muhammad ibn Jabir ibn Sinan ar-Raqqi al-Battani (r.a.) calculated a solar year as being 365 days, 5 hours, 46 minutes and 24 seconds.  The length of the average solar year, at the equinoctial, is 365 days, 5 hours, 48 minutes and 45 seconds.  That is an impressive feat.



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