The earth is round and said who proposed that the earth is round, and who proposed it

Portuguese Magellan.

For thousands of years, human beings have been very interested in the land in which they live. In ancient China, there was a saying that "the sky is round and the earth is round", the West Asians believed that the earth was a hemisphere floating on the ocean, the ancient Greeks originally imagined it as a flat disk, and so on. In the 6th century B.C., the ancient Greek mathematician Pythagoras first proposed the concept of the earth.

Around the 3rd century BC, Eratosthenes, a scientist living in Alexandria, established the concept of the earth using geometric methods. In the 2nd century AD, the Greek geographer Ptolemy also described the earth as a sphere in his Almagama astronomy. These are all important achievements of human understanding of the earth, but they are only some mathematical inferences and theoretical arguments.

During the Renaissance, humanists discovered these doctrines in ancient Greece, and many people already believed that the earth was round, as were the explorers who opened up new shipping routes. 1519 In 1522, the fleet of Magellan the Portuguese completed the first circumnavigation of the world in the history of mankind, which proved to all mankind with irrefutable facts that the earth is round. This is of great significance to the development of science and mankind's understanding of the universe.

Question 1: Who first proposed that the earth is round Hello, regarding the fact that the earth is round, the process is as follows: The concept that the earth is spherical was first introduced BC.

Pythagoras, the ancient Greek philosopher of the fifth and sixth centuries. But this belief of his was only based on his belief that the sphere was the most perfect of all geometric forms, and not on the basis of any objective fact.

Later, Aristotle gave the first scientific evidence that the earth was spherical based on the fact that the shadow of the moon appeared on the surface of the moon at the time of the lunar eclipse was circular.

So, man is Aristotle, and the time is 384 to 322 BC (that is, the time when Aristotle lived).

Question 2: Who first discovered that the earth is round Magellan?

The concept that the Earth is spherical was first introduced BC.

The ancient Greek philosopher Pythagoras in the fifth and sixth centuries proposed it. But this belief of his was only based on his belief that the sphere was the most perfect of all geometric forms, and not on the basis of any objective fact. Later, Aristotle gave the first scientific evidence that the earth was spherical based on the fact that the shadow of the moon appeared on the surface of the moon at the time of the lunar eclipse was circular.

In the 3rd century B.C., the ancient Greek astronomer Eratosthenes of Cyrene calculated the circumference of the Earth for the first time based on the sunlight hitting the Earth at noon and the distance between the two observation sites. In 726 AD, astronomers from the Tang Dynasty presided over the national astronomical geodetic survey, using the height of the North Pole and the length of the summer day to calculate the length of the meridian and the circumference of the earth. The circumnavigation of the globe in 1622 led by the Portuguese navigator Ferdinand Magellan proved that the Earth is indeed spherical.

At the end of the 17th century, Newton studied the influence of the Earth's rotation on the shape of the Earth, and believed that the Earth should be an ellipsoid with a slightly uplifted equator and slightly flattened poles. In 1733, the Paris Observatory sent two expeditions to Peru at 2° south latitude and La Pulin at 66° north latitude to carry out geodetic surveys, and the results confirmed Newton's speculation.

Question 3: Who first proposed that the earth is round The theory of the circle of the earth was first mentioned in the Tianwen Chapter of the Spring and Autumn Period and the Warring States Period in China, but at that time it was only a concept and had no substantive basis. After the 6th century AD, the ancient Greek mathematician Pythagoras also proposed this concept, due to the backwardness of science and technology at that time, there was very little research on the earth.

During the Renaissance, some advanced scholars in the West began to explore the true idea, and some explorers organized voyages to try to prove that the earth was round. In 1519 AD, the Portuguese explorer Magellan circumnavigated the globe and confirmed that the earth was round.

Magellan simply confirmed that the earth is round

As early as the 3rd century B.C., Erastocenes believed that the earth was round and that the oceans on the earth were actually connected. The Portuguese Magellan was the first to propose that a voyage west could reach India. Ptolemy, an astronomer in the second century C.E., also proposed the theory of the circle of the earth.

They have all calculated the circumference of the earth. Around 1410, Ptolemy's Geography was translated into Latin, and the theory of the circle of the earth became more widespread. Maps drawn at the time showed China and India on the opposite side of the Atlantic, indicating that they could be reached by sailing westward.

But in the minds of many, there was still an edge and an end to the earth, until the voyage of Magellan's fleet finally proved that the earth was round.

In September 1519, Fernando Magellan, a Portuguese nobleman in decline, with the support of the King of Spain, set sail with a crew of 265 men on five obsolete ships from the outer port of San Lucar, Seville, Spain, and began a plan to sail west around the Americas to the island of Molu**. At the end of November, the flotilla reached the coast of Brazil. At the beginning of the following year, he arrived at the mouth of the Río de la Plata and San Ma, Argentina, Taiwan.

In October 1520, the fleet sailed into the southern tip of the Americas. From the end of November to the beginning of March of the following year, the fleet sailed continuously for more than three months in the calm and endless Pacific Ocean. In March 1521, the fleet arrived in the Mariana Islands and the Philippine Islands.

In November, we arrived at the island of Hidery, one of the Molu** islands. The surviving crew loaded a shipload of spices and sailed back via the Indian Ocean on the remnants of the Victoria, arriving in the Spanish port of San Lucar in September of the following year with only 18 survivors. Thus, after nearly three years of sailing, the round-the-world route from Europe across the Atlantic Ocean and back to Europe via the Pacific and Indian Oceans was finally opened.

The opening of new shipping routes from Europe to Africa or South America to Asia confirmed the theory of the circle of the earth, which was of great significance to the development of science and technology and the renewal of mankind's cosmology.