Famous for: He was a Greek Philosopher who thought that the Earth was the center of all things
Why: His thought was important because it advanced our knowledge and we looked further which resulted in modern knowledge about our solar system.

Famous for: Creating a heliocentric model of the solar system

Why: The use of observations and geometry to solve a scientific problem

Famous for: He supported Aristotle’s thought of a geocentric solar system. He then created a detailed geocentric model that astronomers used for the next 14 hundred years. He believed that a celestial body travel in a perfect circle at the same speed.

Why: His model was used for the next fourteen hundred years by astronomers

Famous for: Creating a more accurate heliocentric model of the solar system adopting the knowledge that Ptolemy provided that body's travel in perfect circles

Why: The first step in the modern model of the solar system

Famous for: Creating a more accurate heliocentric model of the solar system adopting the knowledge that Ptolemy provided that body's travel in perfect circles. He created The Keplers Laws about planetary motion.

Why: His laws were used for a very long time after his death and are still used today by modern scientists

Famous for: Observed other planets that could be orbited through his telescope and discovered other thing about other celestial bodies such as Jupiter's moon and the moon's mountains and craters.

Why: Influenced more information of the heliocentric model of the solar system and made us question our current knowledge of the planets and encouraged us to look further in space.