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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: tejek who wrote (434361)	11/11/2008 2:03:05 PM
From: TimF	Read Replies (2) \| Respond to of 1585199

Now I know how Columbus felt trying to convince people the world wasn't flat. Another example of your ignorance. It was well known that the Earth wasn't flat at the time of Columbus. The ancient Greeks even had a fairly good approximate measurement how big the Earth's sphere was. You are very like Columbus, thinking he was obviously right, and trying to convince others, when in reality he was wrong. ------ The Myth of the Flat Earth Introduction We all know that Christopher Columbus encountered stiff resistance about his idea of sailing off West to try and reach the East Indies. Many of us have laboured under the impression that people were concerned that he would sail off the edge of the Earth which was widely believed to be flat. History is thought to have vindicated Columbus against those filled with the Christian superstition of a flat Earth who held on to old fashioned beliefs. A minority of people are even under the impression that Galileo's trial centred on the subject rather than whether the Earth orbited the sun. It comes as some surprise, therefore, to find that Columbus was wrong and his critics were right - not because the world is actually flat after all, but because at the time everyone knew it was a globe and were arguing about how big it was. The idea that the uncouth people of the Middle Ages thought the Earth was flat is an example of the myth that has been propagated since the nineteenth century to give us a quite unfair view of this vibrant and exciting period. Christopher Columbus So what was Columbus's mistake? The disagreement between him and his critics was over the size of the world - not an easy thing to measure. The story of this controversy can be traced back to the ancient Greeks and the various ways their writings were transmitted to the West. The Greeks had tried hard to find out how large the Earth is and managed to calculate many different figures depending on the methods and accuracy of their work. The most famous effort today is that of Eratosthenes, Librarian of Alexandria, who wrote a treatise On the Measurement of the Earth (now lost) in which he gave a figure for the Earth's circumference of 250,000 stadia. Depending on how long a stadia actually was this is the equivalent of about 23,000 miles, creditably close to the true figure of 24,900 miles. However, given his method involved pacing out the distance between two points 500 miles apart, we must allow that he enjoyed a good deal of luck as well. At the time Eratosthenes's result did not demand universal assent and was widely seen as too big. A more popular figure is that given in by Strabo and Ptolemy, two distinguished Greek geographers of around the first century AD who both suggested 180,000 stadia. We are not sure where they got their figures from but they were repeated by the Latin writer Seneca who transmitted them to the medieval West. By the time that it became a live issue for Columbus, Eratosthenes' figure was back in vogue and the experts were wisely urging the Italian not to set sail. In particular a committee set up in Salamanca examined the plans and rejected them on the grounds that Columbus had underestimated the distance he would have to travel. Their concern is easy to understand - imagine how much trouble Columbus would have been in if the Americas had not been there. He could not possibly have survived the trip all the way to the east coast of Asia and was very lucky that some land intervened before he and his crew had to pay for his mistake. In the end, however, Queen Isabella of Spain was won over and donated the resources required. It is not difficult to see how the story of Columbus was adapted so that he became the figure of progress rather than a lucky man who profited from his error. According to Jeffrey Burton Russell here, the invention of the flat Earth myth can be laid at the feet of Washington Irving, who included it in his historical novel on Columbus, and the wider idea that the everyone in the Middle Ages was deluded has been widely accepted ever since. bede.org.uk