Ptolemy was an astronomer, mathematician, and geographer who lived during the 2nd century CE. He is known for his geocentric (Earth-centred) model of the universe.

Ptolemy I Soter (/ ˈ t ɒ l əm i /; Greek: Πτολεμαῖος Σωτήρ, Ptolemaîos Sōtḗr, "Ptolemy the Savior"; c. 367 BC – January 282 BC) was a Macedonian Greek [2] general, historian, and successor of Alexander the Great who went on to found the Ptolemaic Kingdom centered on Egypt.

Sep 7, 2023 · Claudius Ptolemy (c. 100 to c. 170 CE) was an Alexandrian mathematician, astronomer, and geographer. His works survived antiquity and the Middle Ages intact, and his theories, particularly on a geocentric...

Ptolemy explained and extended Hipparchus's system of epicycles and eccentric circles to explain the Earth-centered theory of the world. Ptolemy's system involved at least 80 epicycles to explain the motions of the Sun, the Moon, and the five planets known in his time.

Ptolemy I Soter (366-282 BCE) was one of the successor kings to the empire of Alexander the Great. He served not only as king of Egypt but also the founder of the Ptolemaic Dynasty, a dynasty which included the infamous Cleopatra VII. Ptolemy was a …

Jan 10, 2025 · Ptolemy I Soter was a Macedonian general under Alexander the Great, who became satrap and eventually king of Egypt. He founded the Ptolemaic dynasty.

Ptolemy , Latin Claudius Ptolemaeus, (born c. ad 100—died c. ad 170), Greek astronomer and mathematician. He worked principally in Alexandria. It is often difficult to determine which findings in his great astronomical book, the Almagest, are Ptolemy’s and which are Hipparchus ’s.

May 23, 2024 · Claudius Ptolemy (c. 100 – c. 170 AD) was a towering figure in the ancient world, renowned for his extensive contributions to various fields of science. His life and works left an indelible mark on mathematics, astronomy, astrology, geography, and music theory.

Ptolemy as Pharaoh of Egypt, British Museum, London. In 332 BC, Alexander the Great, King of Macedon, conquered Egypt, which at the time was a satrapy of the Achaemenid Empire later called Egypt's Thirty-first Dynasty. [16] He visited Memphis, and travelled to the oracle of Amun at the Siwa Oasis.The oracle declared him to be the son of Amun. Alexander conciliated the …

Jul 3, 2019 · Claudius Ptolemy (often called Claudius Ptolemaeus, Ptolomaeus, Klaudios Ptolemaios, and simply Ptolemeus) was one of the earliest of these observers. He systematically charted the sky to help predict and explain the motions of the planets and stars. He was a scientist and philosopher who lived in Alexandria, Egypt nearly 2,000 years ago.