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Copernicus was known for developing the Heliocentric Theory. That theory supports the idea that the Sun is the center of the solar system and that the planets orbited around it.

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Kepler discovered that planets travel in stretched out circles called ellipses. They orbit the sun.

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Galileo was the author of this book that promoted the idea that the Earth was a planet that orbited the Sun. Eventually he had to revoke the ideas from the book since it went against the Catholic Church.

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Harvey published a study on how your blood circulates and flows through your body. The study also explained how the valves in the heart worked.

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Newton discovered his theory of gravity after sitting under an apple tree one day and an apple fell on his head. He came up with the idea that gravity attracted all objects to each other.

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Francis Bacon proved hypothesis with scientific experiments. He also made a book on the many experiments he did.