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Galileo Galilei was born in 1564 and died in 1642.  He was  a scientist who helped form how we research today.  He created the scientific methods.  He made many improvements to the telescope helping in lean more and advancing our thinking.  He observed the moons orbiting jupiter and earth.Galileo Galilei was born in 1564 and died in 1642.  He was  a scientist who helped form how we research today.  He created the scientific methods.  He made many improvements to the telescope helping in lean more and advancing our thinking.  He observed the moons orbiting jupiter and earth.

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Johannes Kepler was born in 1571 and died in 1630.  He was a mathematician and astronomer from Germany.  He figured out that the planets did not rotate perfectly like Ptolemy and Copernicus said they did.  He made the principles called the Kepler’s Laws.  Those are: planetary orbits are ellipses with the sun at one focus, Planets move faster in orbit when they are closer to the sun, and the ellipses of the planet from the sun is the time it takes to go once around its orbit.

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Nicolaus Copernicus was born in 1473 and died in 1543.  He was an astronomer from Poland, he thought that the middle of the universe was to complicated so he made his own heliocentric model but it wasn’t perfect because he made it from what he say.  He also uses Ptolemy’s idea of the planets on wheels and that they moved in perfect uses.  He is important because he made one of the first modern models of the solar system.

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Ptolemy was born around 100 CE and died around 170CD.  He was also an astronomer, a geographer and a mathematician who lived in Egypt.  He wrote a book about his observations of the universe.  He made a detailed model that had the earth in the center.  His ideas were used for centuries.  He believe that the planets moved on wheels. It helped people find the motion of the planets in the future.

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Aristarchus was born around 310 BCE and died around 230 BCE. He was a great astronomer and mathematician.  He had an idea about our universe being heliocentric.  His idea was cast away but he was correct.  He tried to measure the distance between the moon and the sun.

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Born in 384 BCE and died in 322 BCE. Aristotle was a Greek Philosopher.  He made a detailed model of the solar system changing how the people thought about our world.

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He gave credibility to the heliocentric model and found that venus went through changes like earth's moon.

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He is remembered because he made many discoveries and changed our thinking. He also made many advancements to the telescope making it better.

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He believed our solar system was heliocentric.

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He believed that the solar system was heliocentric

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He Believe the solar system was geocentric

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He believe that the solar system was geocentric

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He believed that the solar system was heliocentric

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He is remembered because he was one of the first people to find that the universe was heliocentric

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He was remembered because he made a model with ideas that wasn't here before.

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He is remembered because he made calculations about the relationship with our sun and our planets.

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He is remembered because he made a breakthrough in visualizing space and he was one of the first to do it.

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He is remembered because we wrote a book about what he found about the universe. It was a breakthrough in what people knew.