1. A closed curve for which the sum of the distances from any point on the ellipse to two points inside {called the foci} is always the same? 2. Each planet moves around the Sun in an orbit that is an ellipse, with the Sun at one focus of the ellipse? 3. The straight line joining a planet and the Sun sweeps out equal areas in space in equal intervals of time? 4. The square of a planet's orbital period is directly proportional to the cube of the semimajor axis of its orbit? 5. Was a Danish astronomer and nobleman who made accurate observations of the movement of celestial bodies in an observatory built for him by King Frederick H of Denmark in 15?6? 6. Was a German astronomer and mathematician who worked as an assistant to Brahe and formulated the three laws of planetary motion based on Brahe's extensive astronomical data? T. States that planets follow an elliptical orbit? E. Johannes Kepler is best known for the: Here's the option Principle of stellar parallax Sun-centered Universe Laws of planetary motion Invention of the rst telescope 9. Who determined the positions of TI? xed stars accurately from his observatory in Denmark? ID. Using Brahe's observations and data what was Kepler's ndings about the shape of the orbit followed by the planets