For which project would knowledge of Kepler's laws prove most useful?

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determining the structure of the solar system's planets
measuring the distance between Earth and the moon
putting a communications satellite in Earth orbit
calculating the mass of Earth

Determining the structure of the solar system's planets

For determining the structure of the solar system's planets.

Knowledge of Kepler's laws would prove most useful for determining the structure of the solar system's planets. Kepler's laws of planetary motion describe how planets move in their elliptical orbits around the sun. These laws allow scientists to accurately calculate the relative positions and movements of planets, which in turn helps in understanding the structure and dynamics of the entire solar system. By applying Kepler's laws, scientists can determine the sizes, shapes, and distances of planets, as well as predict their future positions in space.