History of Astronomy

Aristotle

• He thought Earth was the center of all things
• He made models with the Earth in the center
• He discovered if Earth went around the sun, the relative position of stars would change

Aristarchus

• He wanted to know the distance from the planets and stars
• He attempted to measure the relative distance from the moon and sun
• He made important observations for the scientist too
• He helped with making models

Ptolemy

• He was a astronomer, geographer, and mathematician
• He made a geocentric model of the planets with Earth in the center
• He made models that moved in a circular movement
• It helped scientist make predictions for the future

Copernicus

• He was into the way the planets were placed
• He had observations and had data about the movement
• He was great fro the detailed models he made
• Instead of putting the Earth in the center he put the Sun
• He helped with the first step in the development of modern models for the solar system

Kepler

• He made observation on the planets by the movement it goes in
• He showed that the planet don't go in a complete circular motion
• He formulated the three principles, which are known as Kepler's laws
• 1) planets orbit are ellipses with the sun 2)Planets move faster when closer to sun
• 3) Distance from the planets to the sun of how long it takes to orbit

Galileo

• He was into making improvements and invented the telescope
• He also made great observations about the moon, and the different phases
• He also discovered the way the planets move too
• He made the telescope which was a big help to scientist