Planetary Science

How do planets move around the sun?


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Description: Planets move around the Sun in elliptical orbits. Kepler was the first person to show this.

Causes: Planets have inertia which would cause them to move in straight lines

unless acted on by a force.

There is a force acting on the planets. It's the force of gravity between the planets and the Sun.

Isaac Newton showed how gravitation can produce the observed elliptical orbits.