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Al-Khujandi accurately computed the
axial tilt to be 23°32'19" (23.53°),
[1] which was a significant improvement over the Greek estimate of 23°51'20" (23.86°)
[2] and still very close to the modern measurement of 23°26' (23.44°).
This is wrong! The obliquity has not a constant value, but is decreasing with time. It was 23°51' at the time of Ptolemy and is actually 23°26'. Al-Khujandis value is only valid for his time!
Siffler (
talk)
18:55, 21 September 2008 (UTC)
Hey, obviously Khujandi cannot be from "the Mongol nobility" since the Mongols wouldn't be in the region for a couple hundred years!!! — Preceding unsigned comment added by 76.181.83.193 ( talk) 23:47, 4 June 2012 (UTC)
References
"Al-Tusi says that al-Khujandi was one of the rulers of the Mongol tribe in that region so he must have come from the nobility." From [1]. Wiqi( 55) 00:57, 5 June 2012 (UTC)
![]() | This article is rated Stub-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||||||
|
Al-Khujandi accurately computed the
axial tilt to be 23°32'19" (23.53°),
[1] which was a significant improvement over the Greek estimate of 23°51'20" (23.86°)
[2] and still very close to the modern measurement of 23°26' (23.44°).
This is wrong! The obliquity has not a constant value, but is decreasing with time. It was 23°51' at the time of Ptolemy and is actually 23°26'. Al-Khujandis value is only valid for his time!
Siffler (
talk)
18:55, 21 September 2008 (UTC)
Hey, obviously Khujandi cannot be from "the Mongol nobility" since the Mongols wouldn't be in the region for a couple hundred years!!! — Preceding unsigned comment added by 76.181.83.193 ( talk) 23:47, 4 June 2012 (UTC)
References
"Al-Tusi says that al-Khujandi was one of the rulers of the Mongol tribe in that region so he must have come from the nobility." From [1]. Wiqi( 55) 00:57, 5 June 2012 (UTC)