Nasir al-Din al-Tusi - Wikipedia, the free encyclopedia

Saudi cleric rejects that Earth revolves around the Sun
▻http://english.alarabiya.net/en/variety/2015/02/16/Saudi-cleric-Sun-revolves-around-stationary-Earth.html

A Saudi cleric has appeared in a recent video rejecting the fact that the Earth revolves around the Sun and claiming the opposite holds true, prompting a wave of social media remarks.

Answering a student question on whether the Earth is stationary or moving, Sheikh Bandar al-Khaibari replied: “stationary and does not move.”

He then attempted to support his argument by quoting some clerics and selected religious statements. But his most controversial method to debunk the rotation theory was a “logical” deduction in which he used a visual.

“First of all, where are we now? we go to Sharjah airport to travel to China by plane, clear?! focus with me, this is Earth;” he said, holding a sealed water cup.

He argued that if a plane stops still in air “China would be coming towards it” in case the Earth rotates on one direction. It the Earth rotates on opposite direction, the plane would never reach China, because “China is also rotating.”

Quand on pense que… Nasir al-Din al-Tusi
▻http://en.wikipedia.org/wiki/Nasir_al-Din_al-Tusi

Tusi convinced Hulegu Khan to construct an observatory for establishing accurate astronomical tables for better astrological predictions. Beginning in 1259, the Rasad Khaneh observatory was constructed in Azarbaijan, south of the river Aras, and to the west of Maragheh, the capital of the Ilkhanate Empire.

Based on the observations in this for the time being most advanced observatory, Tusi made very accurate tables of planetary movements as depicted in his book Zij-i ilkhani (Ilkhanic Tables). This book contains astronomical tables for calculating the positions of the planets and the names of the stars. His model for the planetary system is believed to be the most advanced of his time, and was used extensively until the development of the heliocentric model in the time of Nicolaus Copernicus. Between Ptolemy and Copernicus, he is considered by many[who?] to be one of the most eminent astronomers of his time.

For his planetary models, he invented a geometrical technique called a Tusi-couple, which generates linear motion from the sum of two circular motions. He used this technique to replace Ptolemy’s problematic equant[14] for many planets, but was unable to find a solution to Mercury, which was solved later by Ibn al-Shatir as well as Ali Qushji.[15] The Tusi couple was later employed in Ibn al-Shatir’s geocentric model and Nicolaus Copernicus’ heliocentric Copernican model.[16] He also calculated the value for the annual precession of the equinoxes and contributed to the construction and usage of some astronomical instruments including the astrolabe.

Ṭūsī criticized Ptolemy’s use of observational evidence to show that the Earth was at rest, noting that such proofs were not decisive. Although it doesn’t mean that he was a supporter of mobility of the earth, as he and his 16th-century commentator al-Bīrjandī, maintained that the earth’s immobility could be demonstrated, but only by physical principles found in natural philosophy.[17] Tusi’s criticisms of Ptolemy were similar to the arguments later used by Copernicus in 1543 to defend the Earth’s rotation.[18]

About the real essence of the Milky Way, Ṭūsī in his Tadhkira writes: “The Milky Way, i.e. the galaxy, is made up of a very large number of small, tightly-clustered stars, which, on account of their concentration and smallness, seem to be cloudy patches. because of this, it was likend to milk in color.” [19] Three centuries later the proof of the Milky Way consisting of many stars came in 1610 when Galileo Galilei used a telescope to study the Milky Way and discovered that it is really composed of a huge number of faint stars.[20]

al-Tusi, treizième siècle... C’est pourquoi qualifier ces cheikhs wahabites et leurs pareils de « salafistes » est une hérésie.

peut etre que les avions se suspendent effectivement, mais on nous le cache...