History Of Astronomy

Aristotle

• He was a Greek philosopher.
• He modeled the moon, sun, planets, and stars and other circles that surrounded us.
• Thought earth went around the sun.
• Also thought the stars changed positions as earth moved around.
• Came up with parallax which is the sift of positions of a object.

Aristarchus

• Greek astronomer and mathematician.
• He had a model of the solar system.
• Nobody accepted his model of the solar system.
• Attempted to measure the distance to the sun and the moon.
• His attempt/observation was important to solve a scientific problem.

ptolemy

• Astronomer, Geographer,and Mathematician.
• Lived in Alexandria, Egypt (part of Rome).
• Made a book named Almagest. which was about observations of the planet.
• Made a detailed model that was continued to be used by astronomers for the next 14 centuries.

Copernicus

• Polish astronomer.
• thought Ptolemy's model was way too complicated.
• He developed the first detailed heliocentric model of the solar system.

Kepler

• German mathematician and astronomer.
• carefully watched planets and found they have planetary motions.
• formed three principles that now are called Kepler's law.
• each states how each planer or object moves/orbits.

Galileo

• Scientist who approached questions in a fashion that we call the Scientific Method
• He made improvements to the telescope.
• Made more powerful telescope to view celestial improvements.
• found earth was not the only object that could be orbited.