Johannes Kepler. Robert Hooke Issac newton

Question

Described the motion of planets around the sun as elliptical
First proposed the idea that a force of attraction applied to all objects in space
Used mathematics to prove that gravity increases with decreasing distance between objects

Answer 1

Here's a summary of the contributions of Johannes Kepler, Robert Hooke, and Isaac Newton regarding the motion of planets and the concept of gravity:

1. Johannes Kepler: He is best known for his three laws of planetary motion. His first law states that planets move in elliptical orbits with the sun at one focus. This was a significant departure from the earlier belief in circular orbits and provided a more accurate description of planetary motion.

2. Robert Hooke: Hooke was one of the early proponents of the idea that a force of attraction acted between objects. He suggested that this gravitational force could explain the motion of celestial bodies and was one of the first to articulate the inverse square law of attraction between massive objects.

3. Isaac Newton: Newton built upon the ideas of both Kepler and Hooke to formulate his law of universal gravitation. He used mathematics to demonstrate that the force of gravity between two objects increases as the distance between them decreases, following an inverse square relationship. Newton's work provided a comprehensive framework for understanding both terrestrial and celestial motion.

In summary, Kepler described the shape of planetary orbits, Hooke contributed to the understanding of gravitational attraction, and Newton mathematically formalized the laws of motion and gravity.