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Q.

QUIZ - Who had constructed the first astronomical sextant ?

Tags: travel, science, quiz -
Asked by truth exposed, 10 Nov '12 04:45 pm
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Answers (5)

1.

The first sextant was developed by Arab astronomers in the 900s AD. The sextant was an update of the mural quadrant in that it could not only measure angles in minutes and degrees; it could also measure them in seconds, a level of accuracy not possible before with quadrants. It also worked with a smaller scale. Sextant means 1/6th turn or 60 degrees. Quadrants and sextants came not only in large sizes but also smaller ones for nautical navigation.
Source: universetoday.com/
Answered by LIPSIKA, 10 Nov '12 04:48 pm

 
  
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2.

The first known mural sextant was constructed in Ray, Iran, by Abu-Mahmud al-Khujandi in 994.
Answered by anantharaman, 10 Nov '12 08:02 pm

 
  
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3.

Lallu yadav.
Answered by samiran panda, 10 Nov '12 04:55 pm

 
  
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4.

Abu-Mahmud al-Khujandi
Answered by iqbal seth, 10 Nov '12 05:04 pm

 
  
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5.

The first known mural sextant was constructed in Ray, Iran, by Abu-Mahmud al-Khujandi in 994. To measure the obliquity of the ecliptic, al-Khujand invented a device that he called al-Fakhri sextant (al-suds al Fakhr), a reference to his patron; Buwayhid ruler, Fakhr al Dawla (976-997). This instrument was a sixty-degree arc on a wall aligned along a meridian arc (north-south line). Al Khujandis instrument was larger than previous such instruments; it had a radius of about twenty meters
Source: google search
Answered by anil garg, 10 Nov '12 07:19 pm

 
  
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