Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. This model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds. The Copernican model displaced the geocentric model of Ptolemy that had prevailed for centuries, which had placed Earth at the center of the Universe. Copernican heliocentrism is often regarded[by whom?] as the launching point to modern astronomy and the Scientific Revolution.
Heliocentric model from Nicolaus Copernicus' De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres)
Although he had circulated an outline of his own heliocentric theory to colleagues sometime before 1514, he did not decide to publish it until he was urged to do so late in his life by his pupil Rheticus. Copernicus's challenge was to present a practical alternative to the Ptolemaic model by more elegantly and accurately determining the length of a solar year while preserving the metaphysical implications of a mathematically ordered cosmos. Thus, his heliocentric model retained several of the Ptolemaic elements, causing inaccuracies such as the planets' circular orbits, epicycles, and uniform speeds,[1] while at the same time introducing such innovative ideas as:-
The Earth is one of several planets revolving around a stationary sun in a determined order.
The Earth has three motions: daily rotation, annual revolution, and annual tilting of its axis.
Retrograde motion of the planets is explained by the Earth's motion.
The distance from the Earth to the Sun is small compared to the distance from the Sun to the stars.
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The two television shows that helped introduce America to new rock ‘n’ roll artists by frequently presenting live performances are <u>Dorsey Brothers' Stage Show</u> and The Ed Sullivan Show.
Both TV shows had the likes of Elvis Presley present and performing their Rock n Roll music on the show live.
Dorsey Brothers' Stage Show was 1-hour show that aired on CBS
Stage Show was hosted by Tommy and Jimmy Dorsey and produced by Jackie Gleason.
On the other hand, The Ed Sullivan Show was hosted by entertainment columnist Ed Sullivan. It also aired on CBS television.
Both TV shows promoted Rock n Roll during the period of 1950s to 1960s.
Hence, in this case, it is concluded that the correct answer is <u>Dorsey Brothers' Stage Show and The Ed Sullivan Show</u>.
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1. Correct answer is: B) Babur
Babur was a conqueror from Central Asia who managed to lay the foundations for the Mughal dynasty in 1526, in the Indian subcontinent. He managed to conquer Northern India, and century and a half later, his successors expanded his empire to whole Indian subcontinent.
2. Correct answer is: A) Islamic expansion into India was facilitated by both Islamic merchants and conquerors.
Islamic merchants spread Islamic religion and culture through trade, and later, with the arrival of Islamic Sultans, Islamic expansion was induced through military conquest in certain areas. Islamic expansion was rapid in India, because it did not encounter much resistance.
3. Correct answer is: D) Muslim armies carried their faith west across the top of the entire continent.
With the expansion of Islam in the 7th century AD, Muslim conquerors managed to spread Islam in North Africa, across Southern Europe (Spain, Portugal), and the Near East. With the decline of The Byzantine Empire, Islam gained ideal conditions for rapid expansion.
4. Correct answer is: A) Military conquests by the Arab Empire and traders of Islamic faith were the primary means for spreading Islam to Africa, Europe, and Asia.
By using all the available means, Islam managed to be widely accepted, from Indonesia to Spain, especially because it was tolerant religion and even non-Arabian people could achieve high positions (even the title of Grand Vizier, the right hand of Sultan).
5. Correct answer is: A) It tolerated a diverse population.
<span>Islam, being a tolerant religion, was not enforced, but people that accepted this religion had more favorable position in the state. Islam accepted different religions and cultures that influenced its development.</span>
... because they opposed the United States becoming a member of the League of Nations.
The League of Nations was the signature idea of President Woodrow Wilson, point #14 of his 14 Points, an international peacekeeping association which he recommended for post-war settlements. The Treaty of Versailles adopted that idea, but back home in the United States, there was not support for involving America in any association that could diminish US sovereignty over its own affairs or involve the US again in wars beyond those pertinent to the United States' own national security.
