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Frst person to use mathmatical calculations to show that the Sun is the center of the universe. He had to delay his publishings until his near death because he believe it would upset peope since it proved against what was thought by leaders of churchs. It circulated for 70 years before beig banned by churchs.
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Astronomer and Mathmatician that helped confirm the sun centered universe idea that Nicolaus Copernicus proposed. Later observed rotation of planets.
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explained what happens during supernovas.
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Dutch mathmatician and astronomer that built a refracting telescope in the mid 1600's
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changed human view on universe with laws of color, motion, gravity and invention of dvanced calculus.