Ptolemy

They were boyhood friends, but Ptolemy was a cautious person, whereas Alexander had more vision and passion.

Ptolemy became one of Alexander's Companions (a group of soldiers who he had grown up with and followed him on his journeys later on) After Alexander's death, Ptolemy quickly obtained control of Egypt. His family reigned in Egypt, until his last remaining descendant, Cleopatra, committed suicide.

Aristarchus was a Greek astronomer who theorized that the Earth rotated on its axis and revolves around the sun. None of his work has ever been discovered, but his ideas live on today and are the basis for many astronomical theories.

well the piri reis map was created in 1929 and as for the ptolemy's map i am currently unable to find the creation date for it so the ptolemy's map came first because i am on a quiz and my teacher says it came first.

Because plain circular orbits could not explain the way the planets move. The philosophers said that the circle was the perfect curve, and Ptolemy's model used circles and epicycles.

An epicycle is a small circle whose centre travels round a larger circle, and the planet then travels round the epicycle. Extra epicycles were added to account for things like the eccentric orbits (which are now recognised as elliptical), and the inclination of the orbits.

However Ptolemy's model represented the movements of the planets pretty accurately which is why no-one thought to challenge it for 1400 years. Ptolemy's model was also in use in planetariums until modern times, when computer driven planetariums took over.

In Ptolemy's model both Venus and Mars have very large epicycles, which we now understand are there to account for the Earth's movement round the Sun.

Claudius Ptolemy worked in Alexandria, Egypt during the second century AD. He was a Greco-Roman mathematician, astronomer, and geographer known for his influential works on astronomy and geography.

Aristotle said the earth was in the center.

Ptolemy supported Aristotle and added to it.

Copernicus said the sun was in the middle.

Galileo also said the sun was in the center and added to Copernicus.

Claudius Ptolemy developed the mathematical astronomy used in Christian and Muslim countries up until the 16Thcentury.

Christopher Columbus and Magellan used Ptolemy's version of the world map during their voyage, but they did not know it was incorrect, thus not ending up where they planned to be.

He found the position of over one thousand stars.

Yes, Ptolemy, the ancient Greek mathematician, astronomer, and geographer, is believed to have been married and had at least one daughter. However, historical records about his personal life are limited, so details about his marriage are not well-documented.

Ptolemy's model of the Solar system accounted for retrograde motion by using a system of epicycles and deferents. The epicycles were smaller circles within larger deferents that allowed for the planets to move backwards temporarily. This complex system of circular motions aligned with the observations but was eventually found to be inaccurate.

The people who gave birth to him.

If you want more info go and ask him.

In Ptolemy's geocentric model, the deferent was a large circle centered on the Earth that carried the center of a smaller circle called the epicycle, where the planets moved. The equant was a point near the center of the deferent where the planet's motion appeared uniform. By incorporating these features, Ptolemy could account for the irregularities in the motion of the planets as observed from Earth, while still preserving the idea of circular orbits as proposed by Aristotle.

The severed head of Pompey. Pompey was Caesar's rival in Rome-they had fought over the consulship of Rome. Pompey had sought refuge in Egypt. Confusingly both of Cleopatra's brothers/husbands were called Ptolemy. This was Ptolemy XIII.

Claudius Ptolemy was a Greek astronomer who lived in Alexandria, Egypt during the 2nd century CE. He is known for his work on astronomy and geography, including creating maps of the known world based on his observations and calculations.

Was he born in Rome? No, he was probably born in Egypt. However, at that time Egypt was part of the Roman Empire (as was everything from Egypt to Greece to Italy to Germany to England). He died in Alexandria, the city in Egypt at the mouth of the Nile

Was Ptolemy a Roman citizen? Almost certainly.

Ptolemy XIII was a pharaoh of Egypt who reigned during the late 1st century BC. He was a member of the Ptolemaic dynasty and co-ruled with his sister Cleopatra VII. Ptolemy XIII is best known for his conflicts with Cleopatra and his involvement in the civil war between her and Julius Caesar.

I do not think Ptolemy moved to Rome. Cleopatra lived there briefly as mistress of Julius Caesar, with full knowledge of Caesar's wife and the Roman people, but Caesar was so powerful and popular at the time that this indiscretion was tolerated. After Caesar's assassination, I think Cleopatra returned to Egypt. Her plans to revisit Rome as a conqueress, with her new husband Marc Antony, were thwarted at the Battle of Actium. Not sure what happened to Ptolemy XIII after Caesar replaced him with his sister Cleopatra.

the planets accurately. This is because Ptolemy's model relied on epicycles and deferents to explain the apparent retrograde motion of planets, which resulted in discrepancies with the observed phases over time. Copernicus later proposed a heliocentric model that offered a more accurate explanation for the phases of planets.

Retrograde motion is an optical illusion where a planet appears to move backwards in its orbit when viewed from Earth. This occurs due to the difference in orbital speeds between Earth and the observed planet. Modern understanding attributes retrograde motion to the relative motion and positions of the Earth and the observed planet as they orbit the Sun.

• When he saw that there were planets AND stars orbiting around earth.

Claudius Ptolemy, also known as Ptolemy, was a Greek-Roman mathematician, astronomer, and geographer who lived in the 2nd century AD. He is most famous for his work "Almagest," a comprehensive mathematical and observational treatise on astronomy that influenced Western and Islamic astronomy for over a thousand years. Ptolemy's geocentric model of the universe, with Earth at the center, dominated astronomy until the heliocentric model proposed by Copernicus in the 16th century.

Yes, Cleopatra did have slaves, as slavery was common in ancient Egypt. Slaves were used for various purposes such as household work, agriculture, and construction. Cleopatra would have likely had slaves to help maintain her palace and estate.

Ptolemy was an ancient Greek mathematician, astronomer, and geographer who made significant contributions to fields such as astronomy and geography. His greatest accomplishments include his geocentric model of the universe, known as the Ptolemaic system, and his work on mapping the stars and constellations in his book "Almagest." These works were foundational in shaping our understanding of the cosmos during antiquity.

Using his telescope, Galileo observed Jupiter over a period of months. He easily noticed the 4 largest moons. Which you can remember using this simple pneumonic device.

I. E.at G.reen C.atterpillars

Io, Europoa, Ganeimyde, and Callisto

Anyway, he observed these over a period of month, and sketched their movements every week or so, and eventually began to notice that they would disappear for a day or two, and then reappear on the other side of Jupiter. Logically they must have been orbiting around Jupiter.

This contradicted the Ptolemic model in which all objects in space orbited around the earth.

Ptolemy's full name is Claudius Ptolemaeus.

Ptolemy believed that Earth was the center of the universe, with the Sun, Moon, and other planets revolving around it in circular orbits. This geocentric model of the universe was the prevailing view in Western civilization for over a thousand years.