- Nov 22, 2010
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Muslims and the radius of the earth !
Muslims did not only prove that the earth is round, they also calculated its radius.
What Biruni figured out with unprecedented accuracy and precision in the 10th century was not known to the west until 16th century.
BBC documentary:
The need to calculate the size of earth was first felt when the Abbasid Caliphate spread far and wide from Spain till Indus river in modern day Pakistan. Muslims are required to pray facing the direction of the Kaaba and being far from Kaaba does not spares one from this obligation. So no matter how far Muslims were from the Kaaba they needed to determine its exact direction to pray. To do this accurately they needed to know the curvature of the earth and knowing this demanded that they know the size of the earth. By the way the Caliph was also curious to know the size of his empire!
https://albasairislamicmedia.wordpre...-on-the-earth/
http://www.muslimheritage.com/articl...surement-earth
Muslims did not only prove that the earth is round, they also calculated its radius.
What Biruni figured out with unprecedented accuracy and precision in the 10th century was not known to the west until 16th century.
BBC documentary:
The need to calculate the size of earth was first felt when the Abbasid Caliphate spread far and wide from Spain till Indus river in modern day Pakistan. Muslims are required to pray facing the direction of the Kaaba and being far from Kaaba does not spares one from this obligation. So no matter how far Muslims were from the Kaaba they needed to determine its exact direction to pray. To do this accurately they needed to know the curvature of the earth and knowing this demanded that they know the size of the earth. By the way the Caliph was also curious to know the size of his empire!
https://albasairislamicmedia.wordpre...-on-the-earth/
http://www.muslimheritage.com/articl...surement-earth