AST 111 Lecture 3. Recent History of Astronomy. The Geocentric Model. IT IS WRONG!. Fine. So what is it?. The Geocentric Model places Earth at the center of the Universe. Everything (Sun, Moon, stars, etc.) revolves around the Earth. The Geocentric Model.
Recent History of Astronomy
IT IS WRONG!
The Geocentric Model places Earth atthe center of the Universe. Everything(Sun, Moon, stars, etc.) revolves aroundthe Earth.
But it’s wrong. So why did it survivefor 2000 years?
Copernicus held onto ancient belief that heavenly motion must occur in perfect circles.
Kepler deduced that planetary orbits arein the shape of ellipses, not circles.
Rather than brushing aside small errorsto validate a preconceived notion,Kepler trusted the carefully taken data and revolutionized astronomy.
THEY ARE PLANETS!
(Planets are not stars!)
WE WILL NEVER USE THE TERM AGAIN!