The scientist who figured out that the planets move in the shape of an ellipse is Kepler
Explanation:
Before Kepler, it was believed that the planets move around the Sun in perfectly circular orbit.
Kepler discovered that this is not true - in fact, the orbit of the planets is an ellipse. This conclusion is summarize in the so-called Kepler's first law of planetary motion. The three laws are:
- The planets moves around the Sun in elliptical orbits, in which the Sun is located at one of the two focii of the ellipse
- A segment connecting the center of the Sun with the center of each planet sweeps out equal areas in equal intervals of time - as a consequence, the planets move faster when they are closer to the sun, and slower when the are farther away
- The square of the orbital period of each planet is directly proportional to the cube of the semi-major axis of its orbit - Mathematically, [tex]T^2 \propto r^3[/tex], where T is the orbital period and r is the semi-major axis
Learn more about Kepler's laws of planetary motion:
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