828 AH
Approximate date
Ulugh Beg's observatory
Timur's grandson Ulugh Beg builds a giant observatory in Samarkand. His tables chart over a thousand stars and measure the year to within a minute.
How it touches Islam The Quran points to the sun and moon as a way to count the years; Muslim astronomers made that counting a science.
It is He who made the sun a shining light and the moon a derived light and determined for it phases - that you may know the number of years and account [of time]. Allah has not created this except in truth. He details the signs for a people who know
Quran 10:5
Source: History ·