2017 · Q86
The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
General KnowledgePhysics
- AGalileo
- BMartin Luther
- CJohannes Kepler
- DCopernicus
Explanation
Kepler's first law (Astronomia Nova, 1609), derived from Tycho Brahe's data, showed that planets orbit the Sun in ellipses. Copernicus proposed heliocentrism with circular orbits; Galileo and Luther are irrelevant here. Hence C.