Trace the shift from an Earth-centered to a Sun-centered model of the universe and explain the emergence of the scientific method.
For over a thousand years, most European scholars, backed by the Church, accepted the ancient Greek idea that Earth sat motionless at the center of the universe, with the sun and planets circling around it. In 1543, the Polish astronomer Nicolaus Copernicus published a book proposing instead that the sun sat at the center and Earth was just one of several planets orbiting it -- a heliocentric model. It was a controversial claim, published, notably, only near the end of his life.
Decades later, Galileo Galilei improved the telescope and, in 1610, observed moons orbiting Jupiter -- clear evidence that not everything in the universe circled Earth, supporting Copernicus. In 1633, the Roman Inquisition tried Galileo for supporting heliocentrism and forced him to publicly recant, placing him under house arrest for the rest of his life -- a vivid example of the tension between new evidence and established authority. Meanwhile, Johannes Kepler calculated that planetary orbits were ellipses, not perfect circles, and Isaac Newton, in 1687, unified the whole picture with mathematical laws of motion and universal gravitation that explained WHY planets move as Kepler had described. Together, these thinkers modeled a new approach later called the scientific method: observe carefully, form a testable idea, and check it against evidence -- a method that still shapes how science works today.
Mastery looks like: They can explain the shift from geocentric to heliocentric models, name the key evidence and thinkers involved, and state the basic steps of the scientific method.
Common stumbles: Thinking the heliocentric model was accepted immediately once proposed, rather than understanding the real resistance from established authority.