physics

A detailed Summary of physics

Early races believed that the earth was flat and stationary, with the sky rotating round it once a day. The early races also believed things that sound weird to us today like the Vedic priests of India believed that the earth was supported upon 12 massive pillars and during the hours of darkness the sun travelled between these pillars without hitting them. The Hindu theory sounds even more peculiar as they believed that earth stood on the back of four elephants, which in turn the elephants stood on the shell of a gigantic tortoise, the tortoise however was supported upon a serpent floating in a limitless sea. All these beliefs had mistakes in the beginning, but as more people tried to explore astronomy, their observations and records became of more value.

Most likely, the first astronomers were Chinese as they adopted a year of 365 days, which enabled them to work out a calendar, and from this they were able to predict eclipses. The Chinese did not just record eclipses, they also recorded comets as so did the Egyptians, but both civilisations were puzzled to what the phenomena meant, and they probably regarded the phenomena as being part of astrology.

The early Egyptians were extremely skilful at measur

About 600 years before Christ, came the great Greek astronomers. Thales was the first of the great Greek astronomers, he was born in about the year 624 B.C and died around about 546 B.C, as well as being a philosopher, he too studied the stars but he went further and tried to explain what he saw. Next was Aristotle who was a famous philosopher who lived from about 384 to 322 B.C. He proclaimed that the earth was not flat but a sphere, he also argued about earth being at the centre of the universe. Aristarchus who lived from 310 to 230 B.C, he concluded that the sun was bigger than the earth, and the moon smaller than the earth, he also suggested that the earth revolved around the sun. Another great astronomer was Eratosthenes he lived from 276 to 194 B.C, Eratosthenes worked out the size of the earth he also was in charge of the great library in Alexandria, where most of the observations and records were kept, but the library was later destroyed. The last two of the great Gree!

s were not greatly in error. He finally came to the conclusion that the earth was not at the centre of the universe. If it was assumed that the sun was at the centre than many complications could be removed with ease. Today we think of the earth being at the centre of the universe and nothing else, Copernicus knew he was taking a huge step. He was saying that the astronomy being taught in schools and in universities was entirely wrong. Even worse still he faced opposition from the Roman Catholic Church who would certainly object to the idea that our world was not of supreme importance. Copernicus himself was a priest, and though he had worked out his theory by 1533 and written it down in a book which he called De Revolutions Orbium Caelestium, he did not feel inclined to publish it. Copernicus' book which also included the movements of all the o

Some common words found in the essay are:
BEGINNING ASTRONOMY, Galileo Galilei, Thales Greek, Koppernigk Copernicus, Copernicus Ptolemy, Tycho Brahe, Catholic Church, Hipparchus Aristarchus', Kepler Kepler, Ptolemy Greek, centre universe, earth centre universe, earth centre, believed earth, greek astronomers, johannes kepler, observations records, solar system, age seventeen, de revolutions, catholic church,

Approximate Word count = 1235
Approximate Pages = 5 (250 words per page double spaced)

Category: Miscellaneous