ASTRONOMERS

ARISTOTLE

• Aristotle was a Greek philosopher born in Northern Greece.
• Was the son of Nichomachus, the court physician to Macedonian royal family.
• Many accepted every word of his writings-or the words that did not contradict the bible.
• Many cases of Aristotle's writings, were based on first-hand observations.
• Aristotle is said to have written 150 Philosophical treatises.

ARISTARCHUS

• Aristarchus of Samos was an Ancient Greek astronomer and mathematician.
• Greek philosopher who theorized the radical view that earth and planets revolve around the sun.
• Aristarchus also applied modern geometric methods to measuring the size of celestial bodies.
• Although his angular measurements were inaccurate, his geometric procedure was correct.
• Sources; google and scienceworld.wolfram.com

CLAUDIUS PTOLEMY

• is a Greco-Roman writer ofAlexandria, know as mathematician, astronomer, geographer, astrologer, and poet
• He propounded the geocentric theory that prevailed for 1400 years.
• Motions of the sun, moon, and planets;Ptolemy again extended the observations and conclusions of Hipparchus.
• Ptolemy's astronomical work was enshrined in his great book.

COPERNICUS

• Renaissance mathematician and astronomer who formulated a heliocentric model of the universe.
• Disturbed by the failure of Ptolemy's geocentric model of the universe to follow Aristotle's uniform circular motion.
• Micheal Maestlin- he univ of Tübingen was the earliest astronomer after Rheticus to do Copernicus Heliocentricism.
• Although he wrote a popular textbook that was geocentric.
• He taught his students that the Heliocentric system was superior.

KEPLER

• Johannesburg Kepler was a German mathematician, astronomer, and astrologer.
• Kepler formulated the correct laws of planetary motion.
• This eventually archiving a place in the development of astronomy.
• Kepler believed firmly in the Copernican System. The orbit of mars. Is very difficult.
• He discovered that the earth and planets travel about the sun in elliptical orbits.

GALILEO

• Galileo Gealileli. Was a physicist,mathematican,astronomer,and philosopher who played a big role in scientific rev.
• Contributions to the sciences of motion, astronomy, strength of materials, and the dev. Of scientific method.
• His insistence that the book of nature was written in the language of mathematics changed natural philosophy.
• Became a recognized method for discovering the facts of nature.