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Astronomer discover so many things that help the earth or people in general to more and more research to make us humans much smarter year by year. Astronomers go back from the 1st century all the way to present day 21st century, their knowledge is so incredible. Astronomer have to be the smartest people ever to live on planet earth.

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Galileo is one of the most famous astronomers ever. He has discovered  many things. He discovered Callisto,Europa,Ganymede, the Rings of Saturn, Io(moon). He is most famous for discovering the rings of Saturn

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We are in the 21st Century. There has been a lot that has been done. Astronomers have came a long way from a very old time period today in the year of 2017.

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The Poland astronomer  Nicolas Copernicus created the Helio-Centric Theory, Gresham's Law,Copernican principle. He was best known for Heliocentrism. Helio Centric theory is a model of the orbiting solar system and how it works and how the planets revolve

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Astronomers made inventions called telescopes so they can look at things in space through it and study the stars,constellations,and planets.

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Issac Newton is the key figure in the scientific revolution he is the greatest mind of the seventeenth Century. He studied optics motion and mathematics. He created a law based on motion. A object in motion stays in motion.

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Planets such as mars, Venus, Mercury, Jupiter, Earth, Saturn and many more have been in the Solar system for billions of years and have been explored many of times. Earth as of now is the only planet to have living life on it with humans and then to have water on it. Water has been discovered on Mars there might also be a possible chance of life on the planet too.

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Space shuttles were made to explore all of the planets and the rest of the universe. A space shuttle was sent in 1989 during the Cold War and it was destroyed during a trip. A lot lot of the money was wasted to make the shuttle and for the space programs that were there during that time. The shuttle was used for missions. It was used to go to the moon once for a Apollo 11 trip. Einstein theory general relativity is right in space time seems much longer and goes faster.

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Most of our information on astronomy come from Greek knowledge. The Philosopher Claudius Ptolemaeus  made two books filled with lot of information he studied many other pioneers and philosophers. He made both of the books in the fourth century.

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I think who contributed the most is Albert Einstein because he discovered so many theories such as  general relativity,The speed of light is constant. Einstein is today know as one of the smartest people or possibly the smartest human to ever live.

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I think who contributed the most is Albert Einstein because he discovered so many theories such as  general relativity,The speed of light is constant. Einstein is today know as one of the smartest people or possibly the smartest human to ever live.

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(Albert Einstein)

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There are many pioneers that study the astronomy field such as  Nicolaus Copernicus, Johannes Kepler,Galileo,Isaac Newton,John William Herschel,Albert Einstein and many more that have specialized in this field.

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There are many pioneers that study the astronomy field such as  Nicolaus Copernicus, Johannes Kepler,Galileo,Isaac Newton,John William Herschel,Albert Einstein and many more that have specialized in this field.

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(pioneers)

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Astronomy is the study of the universe, planets and space

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Astronomy is the study of the universe, planets and space

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(introduction)