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Who proposed the laws of planetary motion?
Question

Who proposed the laws of planetary motion?

A.

Isaac Newton

B.

Roger Bacon

C.

Galileo

D.

Johannes Kepler

Correct option is D

The laws of planetary motion were proposed by Johannes Kepler.
Explanation:

Kepler's three laws describe the motion of planets around the Sun and revolutionized our understanding of the solar system. His work laid the foundation for Newton's theory of gravitation.

Kepler'sThree Laws of Planetary Motion:

Kepler's First Law (Law of Ellipses):
  • Planets orbit the Sun in elliptical paths, with the Sun at one focus of the ellipse.
Kepler's Second Law (Law of Equal Areas):
  • A line connecting a planet to the Sun sweeps out equal areas in equal time intervals, meaning the planet moves faster when closer to the Sun and slower when farther away.
Kepler's Third Law (Law of Harmonies):
  • The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit. In simpler terms, the farther a planet is from the Sun, the longer it takes to orbit.
Additional Information:
  • Isaac Newton – Formulated the law of universal gravitation and three laws of motion.
  • Roger Bacon – A medieval scientist who emphasized empirical methods.
  • Galileo – Improved the telescope, supported the heliocentric theory, and discovered Jupiter’s moons. 

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