History of Observers

By Erns2
  • Period: 100 to


    Claudius Ptolemy was a mathematician, astronomer, astrologer, geographer and a poet born in 90AD and died in 168AD. He recorded about 1000 stars, 300 were newly found. He was responsible for the formation of the first practical theory of refraction of light. He believed that the Earth was the center of the universe.
  • Period: Feb 19, 1473 to May 24, 1543


    Copernicus proposed that the planets instead revolved around the sun. Copernicus went to Italy when he was 18 to go to college, where he prepared for a career in the church, part his preparation involved studing astrology.
  • Period: Aug 19, 1517 to


    He demonstrates that the planets revolve around the sun and disproves the posterio geocentric theory that all evolves around the earth, this is shown in his 1609 work, Astronomia Nova "The New Astronomy". He proved this by having firm evidence in how planetary movement and orbits work.
  • Period: Aug 19, 1546 to


    His observations of planetary motion later gave data toastronomers like Kepler to make the current model of our solar system. He also made several observations of Mars, supernovas, stars and comets, he was able to make this observations by devising the most precise instruments available before the invention of the telescope.
  • Period: Aug 17, 1564 to


    A scientist that used to be a mathematics professor in Italy, he did incredible observations that lead to many discoveries and aids to the field of science. A man that created and observational tool that exceeded the one before the spyglass by over 3x the power. He supported the idea of the earth not being the body that other bodies revolve around, he believed this body that had other bodies revolving around as the center was the sun.
  • Period: to


    English mathematician and physicist That discovered the laws of motion and made the law of gravitation. He also investigated light and discovered sunlight is made of light of different colors and that the colors go in an order from long to short wavelength: red, orange, yellow, green, blue, indigo, violet.