Determination Of Eratosthenes

173 Words1 Page
bulb-icon

Recommended: Greek mathology science and literature

Eratosthenes was a Greek mathematician, geographer, and astronomer. He was the first person to calculate the circumference of the Earth and the tilt of the Earth.
He knew that at local noon on the summer solstice in Syene, the Sun was directly overhead. He knew this because the shadow of someone looking down a deep well at that time in Syene blocked the reflection of the Sun on the water. He measured the Sun's angle of elevation at noon on the same day in Alexandria. The method of measurement was to make a scale drawing of that triangle which included a right angle between a vertical rod and its shadow. This turned out to be about 7.2°. Then he found out the distance from Syene to Alexandria was 5000 stadia, which was about 800 kilometer.

Show More
Related

  • Ptolemy of Alexandria, the Influential Astronomer

    520 Words  | 2 Pages

    Ptolemy of Alexandria, the Influential Astronomer Ptolemy of Alexandria was the most influential astronomer of the ancient world. The books and theories Ptolemy developed served as a major basis for future astronomers. It was during the Renaissance period that his work became thoroughly studied and revised. Ptolemy collected all ancient knowledge of astronomy and geography including it in his book Almagest around 140 A.D. It follows, he then wrote a four volume astrological study known as the Tretrabiblos.

    Read More

  • Middle Ages Vs Renaissance Dbq

    513 Words  | 2 Pages

    In document C, Ptolemy had a theory where the Earth was the center of the Solar System. Other scientists also had this theory when they were examining the stars and Earth's rotation. But other scientists figured out that the Sun was the center of the Solar System instead of Earth. Document D shows the zodiacs and how the stars lining up. These documents show how advance the people in the Renaissance were. Ptolemy and Copernicus were very advanced as well when they had their theories on the Solar System. Also when they would use the stars and constellations for the zodiac symbolizations (Doc

    Read More

  • Plato's Meno and Plato's Republic

    1624 Words  | 4 Pages

    Socrates then managed to verify his theory by demonstrating it on one of Meno’s slaves. He did not directly teach or instruct anything to that boy slave who originally did not know about geometry. Instead, Socrates provided that slave with hints and guided his thoughts step by step. As a result, the boy slave found out a simple geometrical theorem which apparently “emerged” from his mind.

    Read More

  • Copernicus: The Pioneer of Modern Astronomy

    497 Words  | 1 Pages

    Copernicus was a Polish astronomer born in 1473, in Thorn, Poland and died in 1543. He entered the University of Krakow in 1491 and studied there for four years. In 1496 he joined the University of Bologna in Italy to study church law and studied astronomy on his own time. He was asked to make a new calendar using the geocentric theory, the theory that the sun and moon orbit the earth. He found several flaws with this system and was bothered by it and went on to discover that the planets actually orbit the sun. Galileo supported Copernicus’ theory when he made discoveries with the telescope. We consider Copernicus to be the founder of modern Astronomy.

    Read More

  • Agamemnon And Clytemnestra Analysis

    1485 Words  | 3 Pages

    When I look at the word oppression, images come to mind; images like being inferior and downtrodden. The word “oppression” can and is a powerful weapon. Let’s look at the meaning of the word, “the exercise of authority or power in a burdensome, cruel or unjust manner, the state of being oppressed.” (dictionary.com, 2013). During South Africa’s fight for freedom from the cruelty of apartheid, Steve Biko made many speeches to help raise the consciousness of his black brothers and in one of his speeches, he made this statement, the most important weapon in the hands of the oppressor is the MIND of the oppressed.” (Boddy.Evans, 2013). This is a powerful statement and it makes the meaning of “oppression” very clear. Words like oppression and discrimination are powerful and painful. They are tools that have been used in the past and are still in use today. You can be oppressed and discriminated by words as well as action. There have been many times when certain groups have been oppressed and treated with unbelievable cruelty. I am referring to the enslavement of the African people and to the mass killing and displacement of the Native American Indians. During that time, blacks were captured from Africa and brought over to America to do hard labor. They were treated as property, shackled like animals and they endured unbelievable cruelty. This is what I would call the ultimate meaning of oppression. There rights and dignity as a human being was taken away from them. Slavery lasted in this country for over 300 years. That time was during slavery in America. (Schiller, 2011). The American Indians were beaten almost to annihilation just because the land that they were on was coveted by the American settlers. (“North American Indians, 2013). We live in a society that has thrived on discrimination

    Read More

  • Columbus And Columbus: Ideas And Views Of Columbus

    1387 Words  | 3 Pages

    After 3rd century BC, Eratosthenes calculation about Earth's circumference was used correctly in different locations such as Alexandria and syene (Aswan now) by simple geometry and the shadows cast. Eratosthenes's results undertaken in 1ST century by Posidonius, were corroborated in Alexandria and Rhodes by the comparison between remarks is excellent.

    Read More

  • Greek Influences on Western Civilization

    340 Words  | 1 Pages

    Geometry, a cornerstone in modern civilization, also had its beginnings in Ancient Greece. Euclid, a mathematician, formed many geometric proofs and theories [Document 5]. He also came to one of the most significant discoveries of math, Pi. This number showed the ratio between the diameter and circumference of a circle.

    Read More

  • An Essay About Archimedes

    2001 Words  | 5 Pages

    ...to the Second Punic War with the defense of Syracuse. He even made amazing engineering tools and machines that benefitted the community, like the Archimedes screw, which helped irrigation among other things. The Archimedes’ principle, which is said to of helped King Hiero ll, showed the different densities between objects using the buoyancy of the water. The findings in mathematics from Archimedes like The Quadrature of the Parabola and the Measurement of a Circle have greatly benefitted mathematics and are still helping now. Archimedes wrote a lot of different works, including his most famous Archimedes Palimpsest, which contained many more important writing like On Floating Bodies. With his amazing inventions, intricate ideas on science, intelligent theorems and principles in mathematics, and his life in general, Archimedes has greatly affected society in many ways

    Read More

  • Alexandria's Impact On Modern Culture

    852 Words  | 2 Pages

    Perhaps one of the greatest accomplishments of the 3rd century was made by Eratosthenes, who calculated the circumference of the earth within 300 miles of its actual distance. Also, the Alexandrians made great leaps forward in the field of medicine. Hippocrates, who is regarded as the father of modern medicine wrote 53 books on medicine. Later, Herophilus became the first to dissect a human corpse and document in great detail the inside of a human body. Furthermore, he and almost all Egyptian, Greek, and Roman doctors put great stress on the importance of hygiene, diet, exercise and bathing, which are still some of the foundations of modern health. However, the greatest overall advancements that the Alexandrians made great were technological advancements. One man who helped move technology of the ancient world forward the most was Hero, who invented the water clock and the steam turbine. Some of the inventions created by the Alexandrians are still used today, such as levers, pulleys, pumps, screws, springs, and

    Read More

  • Aristarchus

    351 Words  | 1 Pages

    Aristarchus lived from about the year 310 B.C. to about 230 B.C. Aristarchus was the first Greek philosopher and mathematician to make sense of the solar system. Others before him thought that the Earth is a sphere and that it moves, but he was the first to understand the heliocentric theory, which states that the sun is in the middle. In 288 or 287 B.C. he followed Theophrastus as the head of the Peripatetic School established by Aristotle.

    Read More

  • Hypatia

    893 Words  | 2 Pages

    Hypatia was born in the year 370 AD in Alexandria, Egypt. She was the daughter of Theon, a famous mathematician and astronomer. He invented many things, but his most famous invention is the astrolabe, which measures the altitude of a star or planet. Hypatia studied with her father for many years at the Museum in Alexandria, but soon became unsatisfied with his instruction because she was smarter than him. She left Egypt, and traveled to Greece and Rome to do "post-graduate" work. Her brains and beauty gave her a wonderful reputation throughout the capitols near the Mediterranean.

    Read More

  • Mathematics of Telescopes

    1229 Words  | 3 Pages

    He was one of the first who created the "looker" (now called telescope) by placing two pieces of lenses together. The discovery that placing lenses together can magnify images was made by children who took Lippershey's spectacles and looked at a distant church tower. One of the most influential scientists associated with the telescope has to be Galileo. He took the design and reinvented the telescope into one of the first refractive telescopes we use to this day. Galileo used this great invention to report astronomical facts such as the moon is covered with craters instead of being smooth, the Milky Way is composed of millions of stars, and Jupiter has four moons.

    Read More

  • Euclid and Archimedes

    830 Words  | 2 Pages

    Euclid, who lived from about 330 B.C.E. to 260 B.C.E., is often referred to as the Father of Geometry. Very little is known about his life or exact place of birth, other than the fact that he taught mathematics at the Alexandria library in Alexandria, Egypt during the reign of Ptolemy I. He also wrote many books based on mathematical knowledge, such as Elements, which is regarded as one of the greatest mathematical/geometrical encyclopedias of all time, only being outsold by the Bible.

    Read More

  • Ancient Greek Astronomy

    1539 Words  | 4 Pages

    Since the first Egyptian farmers discovered the annual reappearance of Sirius just before dawn a few days before the yearly rising of the Nile, ancient civilizations around the Mediterranean have sought to explain the movements of the heavens as a sort of calendar to help guide them conduct earthly activities. Counting phases of the moon or observing the annual variations of day length could, after many years' collection of observations, serve as vital indicators for planting and harvesting times, safe or stormy season for sailing, or time to bring the flocks from winter to summer pastures. With our millennia of such observation behind us, we sometimes forget that seeing and recording anything less obvious than the rough position of sun or nightly change of moon phase requires inventing both accurate observation tools (a stone circle, a gnomon used to indicate the sun's shadow, a means to measure the position of stars in the sky) and a system of recording that could be understood by others. The ancient Greeks struggled with these problems too, using both native technology and inquiry, and drawing upon the large body of observations and theories gradually gleaned from their older neighbors across the sea, Egypt and Babylonia. Gradually moving from a system of gods and divine powers ordering the world to a system of elements, mathematics, and physical laws, the Greeks slowly adapted old ideas to fit into a less supernatural, hyper-rational universe.

    Read More

  • History of Physics

    1319 Words  | 3 Pages

    Physics began when man first started to study his surroundings. Early applications of physics include the invention of the wheel and of primitive weapons. The people who built Stone Henge had knowledge of physical mechanics in order to move the rocks and place them on top of each other. It was not until during the period of Greek culture that the first systematic treatment of physics started with the use of mechanics. Thales is often said to have been the first scientist, and the first Greek philosopher. He was an astronomer, merchant and mathematician, and after visiting Egypt he is said to have originated the science of deductive geometry. He also discovered theorems of elementary geometry and is said to have correctly predicted an eclipse of the sun. Many of his studies were in astronomy but he also observed static electricity. Phythogoras was a Greek philosopher. He discovered simple numerical ratios relating the musical tones of major consonances, to the length of the strings used in sounding them. The Pythagorean theorem was named after him, although this fundamental statements of deductive geometry was most likely first an idea from Egyptian methods of measurements. With the help of his followers he discovered that the earth was a sphere, but he did not believe it revolved around the sun.

    Read More

More about Determination Of Eratosthenes

Open Document