Chapter 3.3 Notes

Chapter 3.3 Notes

How did Copernicus, tycho, and kepler challenge the earth centered idea?

·        Copernicus proposed the sun centered model.

·        He used the model to determine the layout of the solar system.

·        Tycho compiled the most accurate naked eye measurements ever made of planetary positions

·        He still could not detect stellar parallax, and thus still thought earth must be at the center of the solar system.

·        He hired keplar who used tychos observations to discover the truth about planetary motion.

·        Keplar first tried to match tychos observations with circular orbits.

·        But an 8 arcminute discrepancy led him eventually to ellipses.