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موضوع: Famous Stargazers

  1. #1
    کاربر ممتاز آوا استار ستاره بنیادی آواتار ها
    تاریخ عضویت
    Aug 2010
    محل سکونت
    تهران
    نوشته ها
    883
    تشکر
    3,291
    تشکر شده 8,433 بار در 878 ارسال
    ویرایش توسط stargazer : 06-04-2012 در ساعت 02:34 PM دلیل: ordering
    گاهی ستاره هدیه کن به مشت پوچ شب ها ...


  2. #2
    کاربر ممتاز آوا استار ستاره بنیادی آواتار ها
    تاریخ عضویت
    Aug 2010
    محل سکونت
    تهران
    نوشته ها
    883
    تشکر
    3,291
    تشکر شده 8,433 بار در 878 ارسال

          Nicolaus Copernicus

    Nicolaus Copernicus
    1473-1543



    Before the 16th century, the common belief was that the sun and all the other planets revolved around

    the Earth. This theory had been developed by the ancient Greek astronomer Ptolemy around A.D. 150, but the

    Polish astronomer Copernicus found that the Ptolemaic system could not explain the observed motions of the

    planets.
    In 1543, he published a book calledThe Revolutions of the Heavenly Orbs, which argued that the Earth was not

    the center of the universe but was one of the planets and, like them, revolved around the sun. This model of

    the solar system is known as the Copernican system
    .

    Copernicus also said that the Earth spins on its axis once per day, which accounts for why the sky appears to

    revolve around the Earth.


    Copernicus’s theory explained why superior planets—those further from the sun than Earth—sometimes appear

    to be moving backward (inretrogrademotion) with respect to the stars, while those closest to the sun—Mercury

    and Venus—always appear to move in only one direction. The Earth is moving in a faster orbit around the sun


    than the more distant planets—periodically “passing” them, making them appear to move backward. But Mercury

    and Venus are moving in even faster orbits closer to the sun. Copernicus was right about the basic arrangement

    of the solar system, but he had no real proof
    .

    گاهی ستاره هدیه کن به مشت پوچ شب ها ...

  3. 9 کاربر مقابل از ستاره بنیادی عزیز به خاطر این پست مفید تشکر کرده اند.


  4. #3
    کاربر ممتاز آوا استار
    تاریخ عضویت
    Jun 2011
    نوشته ها
    759
    تشکر
    11,042
    تشکر شده 5,806 بار در 807 ارسال

    Galileo Galilei

    1564–1642

    Galileo is considered the first astronomer to use the telescope. The telescope also allowed Galileo to verify Copernicus's theory that the

    planets circle the Sun (the heliocentric theory), and not Earth (the Ptolemaic theory). The idea that the Sun

    was at the center of our universe was so revolutionary that in 1616 Galileo was condemned by the

    Inquisition and forbidden to discuss Copernicus's theories





    The Italian astronomer and physicist Galileo is often credited for inventing the telescope. In truth, a Dutch optician invented the telescope before 1609, but as soon as Galileo learned about this important new instrument, he set about making one of his own.

    Galileo worked to improve his telescope and turned it on the sky. In a matter of months he made some astonishing discoveries, including mountains and valleys on the moon, the phases of Venus, and the four big moons orbiting Jupiter. These observations supported the Copernican view of the solar system. Galileo also used the telescope to discover that the Milky Way is composed of countless stars too faint to be seen with the unaided eye.

    Galileo’s popular advocacy of the Copernican system provoked the opposition of the Roman Catholic Church, and he was accused of being a heretic. In 1633 he was forced to denounce the Copernican system and was sentenced to house arrest for the rest of his life.



    aslo you can read more about Galileo Galilei at This Link
    ویرایش توسط stargazer : 02-26-2012 در ساعت 12:18 AM

  5. 9 کاربر مقابل از Amin-Mehraji عزیز به خاطر این پست مفید تشکر کرده اند.


  6. #4
    کاربر ممتاز آوا استار ستاره بنیادی آواتار ها
    تاریخ عضویت
    Aug 2010
    محل سکونت
    تهران
    نوشته ها
    883
    تشکر
    3,291
    تشکر شده 8,433 بار در 878 ارسال

    Sir Isaac Newton

    1643–1727

    This British astronomer is best remembered for discovering the principle of gravity. Legend has it that,

    seeing an apple fall from a tree, Newton concluded that a force, gravity, pulled it to the ground. He then

    used his theory of gravity to explain how the moon is held in its orbit around Earth.

    Newton's theory of universal gravitation states that every particle of matter (anything that takes up space)

    attracts every other particle of matter. The force becomes weaker as the distance between particles is

    increased.
    گاهی ستاره هدیه کن به مشت پوچ شب ها ...

  7. 7 کاربر مقابل از ستاره بنیادی عزیز به خاطر این پست مفید تشکر کرده اند.


  8. #5
    کاربر ممتاز آوا استار ستاره بنیادی آواتار ها
    تاریخ عضویت
    Aug 2010
    محل سکونت
    تهران
    نوشته ها
    883
    تشکر
    3,291
    تشکر شده 8,433 بار در 878 ارسال

    Edmond Halley

    1656–1742

    This British astronomer was the first to calculate the orbit of a comet. The comet was later named after him.

    Halley's comet passes close enough to Earth to be seen about every 76 years. It was last seen in 1986 and

    should return in 2061.
    گاهی ستاره هدیه کن به مشت پوچ شب ها ...

  9. 7 کاربر مقابل از ستاره بنیادی عزیز به خاطر این پست مفید تشکر کرده اند.


  10. #6
    کاربر ممتاز آوا استار ستاره بنیادی آواتار ها
    تاریخ عضویت
    Aug 2010
    محل سکونت
    تهران
    نوشته ها
    883
    تشکر
    3,291
    تشکر شده 8,433 بار در 878 ارسال

    Edwin Hubble

    The American astronomer Edwin Hubble classified the different types of galaxies in the universe and

    developed the theory that the universe is expanding, which is called Hubble's Law. The Hubble space

    telescope, which was carried aboard the space shuttle in 1990, is named in his honor
    گاهی ستاره هدیه کن به مشت پوچ شب ها ...

  11. 7 کاربر مقابل از ستاره بنیادی عزیز به خاطر این پست مفید تشکر کرده اند.


  12. #7
    کاربر فعال آوا استار fampersi آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    همدان
    نوشته ها
    123
    تشکر
    1,850
    تشکر شده 1,034 بار در 121 ارسال

    Hi my dear Avastar's friends
    first of all I wanna say my opinion about this topic
    I think we should begin with our country's honors and astronomers
    therefore I wanna from my friends please put the topic about Iranian astronomers this page
    because we are Iranian and we have many famous savant in our country.
    I hope all of the people identify their country's honors
    thanks

    I come from planet along way from here
    ویرایش توسط محمدرضا صادقیان : 07-12-2011 در ساعت 11:30 AM دلیل: Correcting Dictation & Grammer points
    فانتزی این روزام شده اینکه استادمو ببینم بهم بگه استاتیک 20 شدی....
    اون امتحان سختو گرفتم که عمقی درسو فهمیده باشی...

    امتحانو بیخِِِِِِِِِِِِِِِِِِِِیی ییییییییییییییییییییییییی یییییییییال


  13. #8
    کاربر فعال آوا استار fampersi آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    همدان
    نوشته ها
    123
    تشکر
    1,850
    تشکر شده 1,034 بار در 121 ارسال

    Azophy
    one of the greatest Iranian astronomer is Azophy
    he was born on november 8th 904 in ray
    It is reported that the observation galaxies
    he is the first person who can observed the galaxies without telescope and who has seen the galaxies
    the name of the Azophy is on the moon
    his name is on the some of the holes of the moon
    because he is a very famous astronomer among many astronomers in the other countries
    he has worked a lot, such as discovering lesser magellanic cloud
    other one is correcting some ptolemy's fault
    and at the end he died on 986 in shiraz
    ویرایش توسط محمدرضا صادقیان : 07-12-2011 در ساعت 11:30 AM دلیل: correcting Grammer points
    فانتزی این روزام شده اینکه استادمو ببینم بهم بگه استاتیک 20 شدی....
    اون امتحان سختو گرفتم که عمقی درسو فهمیده باشی...

    امتحانو بیخِِِِِِِِِِِِِِِِِِِِیی ییییییییییییییییییییییییی یییییییییال


  14. #9
    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 fampersi نمایش پست ها
    Hi my dear Avastar's friends
    first of all I wanna say my opinion about this topic
    I think we should begin with our country's honors and astronomers
    therefore I wanna from my friends please put the topic about Iranian astronomers this page
    because we are Iranian and we have many famous savant in our country.
    I hope all of the people identify their country's honors
    thanks

    I come from planet along way from here


    My opinion is same thank you dear friend
    And i also suggest that we start new topics for those great persistent effects of them like Astrolabe , astronomical horoscope and etc.
    ویرایش توسط محمدرضا صادقیان : 07-12-2011 در ساعت 11:31 AM
    You do not really understand something unless you can explain it to your grandmother!Albert Einstein


  15. #10
    کاربر فعال آوا استار fampersi آواتار ها
    تاریخ عضویت
    Feb 2011
    محل سکونت
    همدان
    نوشته ها
    123
    تشکر
    1,850
    تشکر شده 1,034 بار در 121 ارسال

    Famous Stargazers         

    Thanks Fowad for your good offer

    in fact I want from all of the dear members help us to improve my information about my country's honors

    and I suggest we continue by hakim omar khayyam



    فانتزی این روزام شده اینکه استادمو ببینم بهم بگه استاتیک 20 شدی....
    اون امتحان سختو گرفتم که عمقی درسو فهمیده باشی...

    امتحانو بیخِِِِِِِِِِِِِِِِِِِِیی ییییییییییییییییییییییییی یییییییییال

  16. 5 کاربر مقابل از fampersi عزیز به خاطر این پست مفید تشکر کرده اند.


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موضوعات مشابه

  1. Astrolabe : The Famous Astronomical Equipment in the History of Astronomy in Iran
    توسط Fowad در انجمن Astronomical discussions
    پاسخ ها: 7
    آخرين نوشته: 01-06-2013, 08:38 PM

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