paper Who determined the positions of 777 fixed stars accurately from his observatory in Denmark? 4. Galileo Galilei B. Johannes Kepler C Nicolaus Copernicus D. Tycho Brahe Johannes Kepler is best known for the: 4. Invention of the first telescope B. Laws of planetary motion C. Principle of stellar parallax D. Sun-centered Universe demonstrated 3. As one of his three axioms of planetary motion, that the planets move in elliptical orbits around the sun Galileo Galilei B. Johannes Kepler Nicolaus Copernicus D. Tycho Brahe Who was Brahe's most famous student? Galileo Galilei B. Isaac Newton​