Another important contribution by Kepler includes the three laws of planetary motions,
Kepler’s laws of planetary motion usually revolve around cycles, orbits, and regions of the planet and the Sun. Therefore, this principle shows that planets in the solar system centred on the Sun orbit the Sun in an elliptical orbit with the Sun at one focal point.
Based on this assessment of planetary movement, Kep1er introduced a set of laws commonly known today as Kep1er’s three laws. Kepler’s three laws describe the behaviour of a planet as a function of its orbit through the universe. The first two Kepler’s laws were published in The New Astronomy in 1609. Their discovery turned out to be a serious approach to the development of modern science.
Known as the law of ellipses, this law explains that planets rotate around the Sun in orbit described as an ellipse. The first law of this Kepler is commonly known as the law of rotation. The law suggests that the trajectory of each planet with the Sun is an ellipse and that the Sun is in one of the two focal points of the ellipse. According to Kep1er, there is no doubt that the earth will rotate around the Sun, but not in a circular orbit, it revolves around the ellipse. The ellipse has two focal points. The Sun is one of the focal points of the ellipse.
Known as the law of equal area, this law defines the speed at which a particular planet rotates as it orbits the Sun. The speed at which planets rotate in space is constantly changing. Planets rotate fastest when they are closest to the Sun and slowest when they are farthest from the Sun.
Kepler’s third law, called the Law of Harmony, compares one planet’s orbital period and radius with that of another. Unlike Kepler’s first and second laws, which describe the kinetic attributes of a single world, the third law compares the kinetic properties of different planets.
READ MORE ABOUT THE LIFE OF JOHANNES KEPLER HERE
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