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Kepler’s first astronomical publication “Mysterium Cosmographicum” (The Cosmographic Mystery) [1596].
Kepler's work “Mysterium Cosmographicum” mainly focused on proving the distances of the six known planets from the position of the sun by relying on philosophical, religious and geometrical ideas related to the “five Platonic solids”, and the Copernican heliocentric system. His works impacted immensely the philosophy of science since it was the first publication that justified Nicolaus Copernicus’ theory through empirical observations. Kepler, Johannes.Mysterium Comographicum.1596. -
Kepler’s Second Law of Planetary Motion [1602].
Kepler’s second law of planetary motion (1602) supported the heliocentric ideas and contributed to the evolution of the astronomy. This law describes the speed of a planet moving in an elliptical orbit around the sun. It transformed the view of the astronomy by removing the traditional ideas of uniformity in the motion of the planets. His book “Astronomia Nova" (1609) explains this paradigm with the incorporation of methodological applications. Johannes, Kepler. Astronomia Nova,1609 -
Kepler’s First Law of Planetary Motion [1605]
Kepler's first law of ellipses that states "the planets move in elliptical orbits with the sun at one focus" was discovered in 1605. This law eliminates the traditional ideas that stated the planets have circular orbits presented in ancient Aristotelian assumptions and during Copernicus astronomy and cosmology. Today, Kepler’s planetary motion laws are essential in astronomical studies such as the determination of satellite’s orbits and space stations. Kepler, J. Astronomia Nova,1609. -
Kepler’s Third Law of Planetary Motion and his publication “Harmonices Mundi” (The Harmony of the World) [1619]
In 1619, Kepler published “Harmonices Mundi” and found his third law of planetary motion that establishes a relationship between the orbit period of two planets. This law contributed in new discoveries related to the centrifugal force law during the 1660s and Newton’s law of gravitation. Kepler proved physical and rational evidence related to harmonies in planetary motion by calculating the difference of angular speeds of a planet’s orbit. Kepler, J. Harmonices Mundi, 1619.