- bacon: outlined amethod of scientific investigation that depened on close observation
- copernicus: polish astronomer who created the heliocentric theory
- descartes: saw the physical universe as obeying universal mathematical laws; just like bacon
- galileo: used teloscope and discovered new things that supported copernicus&&kepler's ideas
- geocentric: having earth at the center
- heliocentric: having the sun at the center
- kepler: german scientist who used the information by copernicus to continue research
- newton: he explained WHY the sun was in the middle
- rationalism: belief in reason and logic as the primary source of knowledge
- scientific method: a process of steps to draw to a conclusion