Using your phone's internet browser
go to:  qna.rediff.com
Click and drag this link to
the Home icon in your browser.
Q.

Which astronomer 500 years before that realisation dawned on Galileo. proved that earth is spherical ?

Tags: money, science, galileo
Asked by azam khan, 06 Dec '11 01:36 pm
  Invite a friend  |  
  Save  |  
 Earn 10 points for answering
Answer this question  Earn 10 points for answering    
4000 characters remaining  
  
    
Keep me signed inNew User? Sign up

Answers (2)

 
1.

Astronomer Ibn Hazm
Answered by jameel ahmed, 06 Dec '11 04:18 pm

 
  
Report abuse
Useful
 (2)
Not Useful
 (0)
Your vote on this answer has already been received
2.

By the 9th century, many Muslim scholars took it for granted that the Earth was a sphere. The proof, said astronomer Ibn Hazm, is that the Sun is always vertical to a particular spot on Earth. It was 500 years before that realisation dawned on Galileo. The calculations of Muslim astronomers were so accurate that in the 9th century they reckoned the Earths circumference to be 40,253.4km less than 200 km out. The scholar al-Idrisi took a globe depicting the world to the court of King Roger of Sicily in 1139.[2]
How Islamic inventors changed the world
A pre-Islamic Byzantine coin Struck 607 - 609 AD. It features the depiction of a crowned emperor Focas holding a globus cruciger (an orb representing the spherical Earth) more than 400 years before the realisation dawned on Ibn Hazm and 532 years before al-Idrisi took a globe to the court of King Roger.
Answered by harish chandra, 06 Dec '11 01:38 pm

 
  
Report abuse
Useful
 (2)
Not Useful
 (0)
Your vote on this answer has already been received

Ask a Question

Get answers from the community

600 characters remaining

Related Answer

Q.
A

General Sherman..more

Answered by Shan Real