History of Astronomy. Used as a calendar by locating the position of the sun. Made it easy to predict when to plant or harvest crops. Particularly interested in solstices and equinoxes. Early Astronomers. Stonehenge (2800-1075 B.C.) . Located Salisbury Plain in southern England
Made it easy to predict when to plant or harvest crops.
Particularly interested in solstices and equinoxesEarly Astronomers
An arrangement of rock resembling a 28-spoke wheel in Big Horn Mountains of Wyoming.
Planets (from the Greek meaning “wanderers” sometimes move faster or slower and occasionally appear to slow to a stop and move backward over a period of days or months.
Retrograde motion of MarsRetrograde motion
Earth is round. (Earth’s shadow on moon during a lunar eclipse was curved.)
Created a sophisticated mathematical version of geocentric theory to explain motion of the heavens.
Earth is not in the exact center of the universe. Used to provide a scientific explanation of the seasons.Eccentricity:
While the sun travels around the Earth in a circular path called the deferent. The planets travel along the deferent on their own circular paths called epicycles.Epicyle:
Animation of different speedsEquant:
Distributed an unsigned pamphlet in 1507 outlining his hypothesis of a Heliocentric universe.(Afraid to offend Christian Church)
First scientist to make systematic use of the refracting telescope to look at heavens.
Publications of ideas (Concerning the Chief World Systems 1632) gets him interrogated 4 times by Inquisition