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Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran              Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran
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موضوع: Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran

  1. #1
    كاربر فعال آوااستار
    مدال طلاي كشوري المپياد نجوم
    مدال برنز جهاني المپياد نجوم
    Fowad آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    Tehran,Iran
    نوشته ها
    53
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    304
    تشکر شده 399 بار در 48 ارسال

          Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran

    ‏An astrolabe is a historical tool in astronomy which has a lot of uses in locating and predicting the positions of star‪s,planets,sun and etc.Iranian historical astronomers are famous to improve its usage and made it more applicative and also complex!‬
    ‏,astrolabe ‬was their Starry night software‪!‬It was in the rule of a data collector‪.‬Those patient astronomers then analyze all these datas mathematically to gain a new result‪.‬
    ‏Most astrolabes are made by 3 or 4 circular metal plates on each other in a way that can be rotated easily and each circle have some signs and points and lines on them which presents our view of night sky‪.‬
    ‏It was useful for measuring altitude of masses too‪.‬
    ‏‪Some very famous Iranian astronomers are proud to develop astronomy of that days by this tool,like ‬Abū Rayḥān al-Bīrūnī ‪,‬ Jamshīd al-Kāshī‪,‬Abū al-Wafā' Būzjānī and etc‪.‬
    ‪ ‬
    ‏Here we can discuss more about astrolabe‪.‬I also decided to go and visit a very ancient astrolabe which is found in Pariz‪(‬a City in Kerman Province in Iran‪)‬ by archaeologist‪!‬ I will inform you about it as soon as i see it‪

    Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran-images-jpg
    ویرایش توسط Fowad : 07-12-2011 در ساعت 10:48 AM
    You do not really understand something unless you can explain it to your grandmother!Albert Einstein


  2. #2
    كاربر فعال آوااستار
    مدال طلاي كشوري المپياد نجوم
    مدال برنز جهاني المپياد نجوم
    Fowad آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    Tehran,Iran
    نوشته ها
    53
    تشکر
    304
    تشکر شده 399 بار در 48 ارسال

          ancient astrolabe found in Pariz,Sirjan,Kerman,Iran

    Woooooooow!
    My friend sent me some photos of this astrolabe that i told you!It is very interesting!
    notice to the lines beneath the first plate!I think they present the hour circles!
    This one is a little strange!It doesn't look like the other astrolabes that i've ever seen!
    I have put a folder contains more pictures of it!

    http://www.4shared.com/file/s9f1PdhW/Astrolabe.html
    تصاویر کوچک فایل پیوست تصاویر کوچک فایل پیوست Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran-img_3972-jpg  
    You do not really understand something unless you can explain it to your grandmother!Albert Einstein


  3. #3
    کاربر ممتاز آوا استار Sunrise آواتار ها
    تاریخ عضویت
    Nov 2010
    محل سکونت
    tehran
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    thanks a lot dear Fowad

    this Astrolabe is amazing

    ?Do you know which year it had been made & from what

    !it seems to be Zinc

    ?is it
    ... جان تو بندری است، جای ورود نور، جای صدور نور ...


  4. #4
    مدير ارشد Ehsan آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    tabriz-tehran!!!
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    at first:
    tank you fowad!
    you said that they predicted the astronomical events at a good precision!
    so they should had almost correct cosmology for example they should knew that planets are at a circle orbit around sun.
    But did they really know that?
    یک سر به هوای کوچک در این دنیای بزرگ

  5. 9 کاربر مقابل از Ehsan عزیز به خاطر این پست مفید تشکر کرده اند.


  6. #5
    كاربر فعال آوااستار
    مدال طلاي كشوري المپياد نجوم
    مدال برنز جهاني المپياد نجوم
    Fowad آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    Tehran,Iran
    نوشته ها
    53
    تشکر
    304
    تشکر شده 399 بار در 48 ارسال

    نقل قول نوشته اصلی توسط Sunrise نمایش پست ها
    thanks a lot dear Fowad

    this Astrolabe is amazing

    ?Do you know which year it had been made & from what

    !it seems to be Zinc

    ?is it
    your welcome dear Sunrise thanks for your note!
    I dont know exactly,I should research more about it but i myself thought it might be almost 600 years old but after i spoke to my friend i got that its younger than!
    No i think it has been made of copper.

    نقل قول نوشته اصلی توسط Ehsan نمایش پست ها
    at first:
    tank you fowad!
    you said that they predicted the astronomical events at a good precision!
    so they should had almost correct cosmology for example they should knew that planets are at a circle orbit around sun.
    But did they really know that?


    your welcome Ehsan thanks to yourself for your supportive action! ;-)
    as you know the fountain of the success of understanding the solar system was also these accurate measuring of the location of Planets which the point is that all those datas were gained by the equipments of that time and i think astrolabe is exact enough and sufficient to locate planets exactly. e.g. Jamshid was a person who studied the Reversionary Movements of Planets by them.
    But it is still remains a question that why don't they get the facts of solar system even with those accurate datas and it remains unanswered forever i guess!by the way it is not a far optimism that they did it and don't reveal it...!
    ویرایش توسط stargazer : 06-28-2012 در ساعت 01:22 PM دلیل: left align
    You do not really understand something unless you can explain it to your grandmother!Albert Einstein

  7. 8 کاربر مقابل از Fowad عزیز به خاطر این پست مفید تشکر کرده اند.


  8. #6
    کاربر ممتاز آوا استار Negar Najafi آواتار ها
    تاریخ عضویت
    Jun 2011
    محل سکونت
    تهران
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    This topic has been inactive for a long time.
    Let's start again!
    See this astrolabe! It's wonderful!
    It's wooden and made by Mohammad Bagher Ebrahim Alkhorasani in 1293.
    There are Abjad letters on it.




    *source: http://www.aqlibrary.org
    اینجا جنگی در کار نیست...
    آرامش است و سکوت.
    سکوتی از جنس آواز شب مرگ قو
    و آرامشی به رنگ خدا
    آهسته صحبت کنید
    مبادا این آرامش را بهم بزنید
    ...



  9. 5 کاربر مقابل از Negar Najafi عزیز به خاطر این پست مفید تشکر کرده اند.


  10. #7
    مدير ارشد Ehsan آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    tabriz-tehran!!!
    نوشته ها
    1,560
    تشکر
    7,700
    تشکر شده 16,962 بار در 1,519 ارسال

    its remarkable that ancient people could predict planetary motions precisely with an almost wrong cosmology
    today we know Ptolemaic explanation of solar system was not correct but even with this incorrect explanation, the astrolabes told them exact location of planets in future!
    and we should notice that it was more than 10 centuries ago

    Nasir al-din Tusi recorded the planetary motions so exactly and he realized that Ptolemaic model have some inaccuracy

    obviously the Astrolabes based on Ptolemaic model, and with a wrong model you will have a wrong prediction . Tusi improved the Ptolemaic model by his invention: Tusi couple. it was a geometrical solution for correcting the planetary motions

    you can see a Tusi couple here:
    notice to the red line

    also whit his model he improved the astrolabes structure

    his works on astrolabes:


    Tusi's model was the best model in his time and it helped Copernicus to propose the heliocentric model
    یک سر به هوای کوچک در این دنیای بزرگ

  11. 8 کاربر مقابل از Ehsan عزیز به خاطر این پست مفید تشکر کرده اند.


  12. #8
    کاربر فعال آوا استار
    تاریخ عضویت
    Oct 2012
    محل سکونت
    شیراز
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    238
    تشکر شده 993 بار در 109 ارسال

    Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran         
    Hello
    Seeing this topic, I was encouraged to learn more about astrolabes. I searched the web and found some sites fully dedicated to astrolabes.
    Here is the address of one of them which deserves having a look at:
    http://www.astrolabes.org/index.htm
    It even introduces a software called "the electric astrolabe".
    You'd better go and visit the site yourselves.

    Good luck
    «مبارزه با احمق و حماقت مبارزه با نفاق نیز هست، زیرا احمق ابزار دست منافق است»
    علامه شهید مطهری

  13. 8 کاربر مقابل از gshahali عزیز به خاطر این پست مفید تشکر کرده اند.


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