Database: Calculating the Earth's Circumference - Revision history

Soranin: Text replacement - "\[\[zh:(.+)\]\]" to ""

2026-05-13T13:51:11Z

Text replacement - "\[\[zh:(.+)\]\]" to ""

← Older revision		Revision as of 15:51, 13 May 2026
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	[[Category:Database: Art and Science]]		[[Category:Database: Art and Science]]
	{{DEFAULTSORT:Calculating the Earth's Circumference}}		{{DEFAULTSORT:Calculating the Earth's Circumference}}
	[[zh:数据库：计量地球的周长]]		<!--[zh:数据库：计量地球的周长]-->

imported>MikonoshinobiCE at 09:07, 7 September 2025

2025-09-07T09:07:14Z

← Older revision		Revision as of 11:07, 7 September 2025
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	[[Category:Database: Art and Science]]		[[Category:Database: Art and Science]]
	{{DEFAULTSORT:Calculating the Earth's Circumference}}		{{DEFAULTSORT:Calculating the Earth's Circumference}}
			[[zh:数据库：计量地球的周长]]

imported>Soranin at 00:49, 5 January 2024

2024-01-05T00:49:35Z

← Older revision		Revision as of 02:49, 5 January 2024
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	~~{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}~~
	[[File:ACMir Celestial Globe.jpg\|thumb\|250px\|Celestial Globe / 1144, Iran]]		[[File:ACMir Celestial Globe.jpg\|thumb\|250px\|Celestial Globe / 1144, Iran]]
	In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.		In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.

imported>Lady Kyashira at 05:13, 5 November 2023

2023-11-05T05:13:01Z

← Older revision		Revision as of 07:13, 5 November 2023
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	{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}		{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}
	~~{{Imageneed\|~~[[~~Assassin's Creed~~: ~~Mirage~~]]}}		[[File:ACMir Celestial Globe.jpg\|thumb\|250px\|Celestial Globe / 1144, Iran]]
	In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.		In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.

imported>Darman36 at 04:35, 8 October 2023

2023-10-08T04:35:12Z

← Older revision		Revision as of 06:35, 8 October 2023
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	{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}		{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}
	{{Imageneed\|[[Assassin's Creed: Mirage]]}}		{{Imageneed\|[[Assassin's Creed: Mirage]]}}
	In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer ~~{{Wiki\|~~Abd al-Rahman al-Sufi\|al-Sufi}}. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.		In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.

	Around 240 BCE, a Greek mathematician named [[Eratosthenes]] had used shadows projected by [[wood]]en rods to calculate that two cities were separated by 7 degrees, or 1/50th of a sphere. He then multiplied the distance between these two points by 50 to get the size of the Earth, within 5% of modern calculations. Sometime around 830, a team of 70 mathematicians, including the famous mathematician [[Muhammad ibn Musa al-Khwarizmi\|al-Khwarizmi]] (780-850) recreated his experiment. Improving on their predecessor's method, they tried to diminish the risk of error by using points separated by a single degree. Traveling from Baghdad to the surrounding desert and trying to follow a North-South road, they stopped when they reached a point where the elevation of the {{Wiki\|Pole star}} had changed by a degree. Their calculations were similar to those of Eratosthenes. Later, another scientist, [[al-Biruni]] (973-1050), got even better results by using a mountain as his measuring rod!		Around 240 BCE, a Greek mathematician named [[Eratosthenes]] had used shadows projected by [[wood]]en rods to calculate that two cities were separated by 7 degrees, or 1/50th of a sphere. He then multiplied the distance between these two points by 50 to get the size of the Earth, within 5% of modern calculations. Sometime around 830, a team of 70 mathematicians, including the famous mathematician [[Muhammad ibn Musa al-Khwarizmi\|al-Khwarizmi]] (780-850) recreated his experiment. Improving on their predecessor's method, they tried to diminish the risk of error by using points separated by a single degree. Traveling from Baghdad to the surrounding desert and trying to follow a North-South road, they stopped when they reached a point where the elevation of the {{Wiki\|Pole star}} had changed by a degree. Their calculations were similar to those of Eratosthenes. Later, another scientist, [[al-Biruni]] (973-1050), got even better results by using a mountain as his measuring rod!

imported>Darman36 at 04:32, 8 October 2023

2023-10-08T04:32:07Z

← Older revision		Revision as of 06:32, 8 October 2023
Line 1:		Line 1:
	{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}		{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}
	{{Imageneed\|[[Assassin's Creed: Mirage]]}}		{{Imageneed\|[[Assassin's Creed: Mirage]]}}
	In Abbasid Baghdad, every scholar knew that the Earth was spherical. They knew it because they had read about it in translated Ancient Greek manuscripts, most importantly Ptolemy's Almagest, which was translated by the great Abbasid astronomer al-Sufi. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.		In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer {{Wiki\|Abd al-Rahman al-Sufi\|al-Sufi}}. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.

	Around 240 BCE, a Greek mathematician named Eratosthenes had used shadows projected by ~~wooden~~ rods to calculate that two cities were separated by 7 degrees, or 1/50th of a sphere. He then multiplied the distance between these two points by 50 to get the size of the Earth, within 5% of modern calculations. Sometime around 830, a team of 70 mathematicians, including the famous mathematician al-Khwarizmi (780-850) recreated his experiment. Improving on their predecessor's method, they tried to diminish the risk of error by using points separated by a single degree. Traveling from Baghdad to the surrounding desert and trying to follow a North-South road, they stopped when they reached a point where the elevation of the Pole star had changed by a degree. Their calculations were similar to those of Eratosthenes. Later, another scientist, al-Biruni (973-1050), got even better results by using a mountain as his measuring rod!		Around 240 BCE, a Greek mathematician named [[Eratosthenes]] had used shadows projected by [[wood]]en rods to calculate that two cities were separated by 7 degrees, or 1/50th of a sphere. He then multiplied the distance between these two points by 50 to get the size of the Earth, within 5% of modern calculations. Sometime around 830, a team of 70 mathematicians, including the famous mathematician [[Muhammad ibn Musa al-Khwarizmi\|al-Khwarizmi]] (780-850) recreated his experiment. Improving on their predecessor's method, they tried to diminish the risk of error by using points separated by a single degree. Traveling from Baghdad to the surrounding desert and trying to follow a North-South road, they stopped when they reached a point where the elevation of the {{Wiki\|Pole star}} had changed by a degree. Their calculations were similar to those of Eratosthenes. Later, another scientist, [[al-Biruni]] (973-1050), got even better results by using a mountain as his measuring rod!

	Both expeditions were motivated in part by the desire to know the extent of their territory compared to their rivals, and by Islam's requirement to pray facing Mecca's Kaaba, no matter your position in the world. A proof that religious belief and scientific pursuits don't always come into conflict.		Both expeditions were motivated in part by the desire to know the extent of their territory compared to their rivals, and by [[Islam]]'s {{Wiki\|Qibla\|requirement}} to pray facing {{Wiki\|Mecca}}'s {{Wiki\|Kaaba}}, no matter your position in the world. A proof that religious belief and scientific pursuits don't always come into conflict.

	[[Category:Database: Art and Science]]		[[Category:Database: Art and Science]]
	{{DEFAULTSORT:Calculating the Earth's Circumference}}		{{DEFAULTSORT:Calculating the Earth's Circumference}}

imported>Soranin: Created page with "{{Spoilerhd|05 January 2024|Assassin's Creed: Mirage}} {{Imageneed|Assassin's Creed: Mirage}} In Abbasid Baghdad, every scholar knew that the Earth was spherical. They knew it because they had read about it in translated Ancient Greek manuscripts, most importantly Ptolemy's Almagest, which was translated by the great Abbasid astronomer al-Sufi. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumfer..."

2023-10-07T14:57:43Z

Created page with "{{Spoilerhd|05 January 2024|Assassin's Creed: Mirage}} {{Imageneed|Assassin's Creed: Mirage}} In Abbasid Baghdad, every scholar knew that the Earth was spherical. They knew it because they had read about it in translated Ancient Greek manuscripts, most importantly Ptolemy's Almagest, which was translated by the great Abbasid astronomer al-Sufi. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumfer..."

Páàjì titun

{{Spoilerhd|05 January 2024|[[Assassin's Creed: Mirage]]}}
{{Imageneed|[[Assassin's Creed: Mirage]]}}
In Abbasid Baghdad, every scholar knew that the Earth was spherical. They knew it because they had read about it in translated Ancient Greek manuscripts, most importantly Ptolemy's Almagest, which was translated by the great Abbasid astronomer al-Sufi. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.

Around 240 BCE, a Greek mathematician named Eratosthenes had used shadows projected by wooden rods to calculate that two cities were separated by 7 degrees, or 1/50th of a sphere. He then multiplied the distance between these two points by 50 to get the size of the Earth, within 5% of modern calculations. Sometime around 830, a team of 70 mathematicians, including the famous mathematician al-Khwarizmi (780-850) recreated his experiment. Improving on their predecessor's method, they tried to diminish the risk of error by using points separated by a single degree. Traveling from Baghdad to the surrounding desert and trying to follow a North-South road, they stopped when they reached a point where the elevation of the Pole star had changed by a degree. Their calculations were similar to those of Eratosthenes. Later, another scientist, al-Biruni (973-1050), got even better results by using a mountain as his measuring rod!

Both expeditions were motivated in part by the desire to know the extent of their territory compared to their rivals, and by Islam's requirement to pray facing Mecca's Kaaba, no matter your position in the world. A proof that religious belief and scientific pursuits don't always come into conflict.

[[Category:Database: Art and Science]]
{{DEFAULTSORT:Calculating the Earth's Circumference}}

← Older revision		Revision as of 02:49, 5 January 2024
Line 1:		Line 1:
	~~{{Spoilerhd\|05 January 2024\|[[Assassin's Creed: Mirage]]}}~~
	[[File:ACMir Celestial Globe.jpg\|thumb\|250px\|Celestial Globe / 1144, Iran]]		[[File:ACMir Celestial Globe.jpg\|thumb\|250px\|Celestial Globe / 1144, Iran]]
	In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.		In [[Abbasid Caliphate\|Abbasid]] [[Baghdad]], every [[scholar]] knew that the [[Earth]] was spherical. They knew it because they had read about it in translated Ancient [[Greece\|Greek]] manuscripts, most importantly [[Ptolemy]]'s ''{{Wiki\|Almagest}}'', which was translated by the great Abbasid astronomer [[Abd al-Rahman al-Sufi\|al-Sufi]]. They also knew it because they had used simple geometric concepts and trigonometric equations to calculate its circumference.