Question

How does gravity cause the planets to move in a circle around the sun? amplify.

Answer 1

Perpendicular Forces
However, the sun's gravitational field doesn't oppose or amplify the planet's forward motion; if it did, the planet would gradually spiral toward the sun or away from it. Instead, the force of gravitation acts in a direction that is almost exactly perpendicular to the planet's forward motion.

Answer 2

The sun's gravity pulls the planet toward the sun, which changes the straight line of direction into a curve.

Step-by-step explanation:

This keeps the planet moving in an orbit around the sun. Because of the sun's gravitational pull, all the planets in our solar system orbit around it.