How Does Gravity Hold the Planets in Place?

Gravity is like an invisible string that pulls things together. The Sun uses gravity to keep Earth and other planets in their orbits, just like how your hand can keep a ball from rolling away.

Like a Game of Catch

Think of the Solar System as a game of catch. The Sun throws out its energy, and the planets catch it, gravity keeps them from flying off into space. It’s like being on a swing: you go up high, but gravity brings you back down.

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Examples

If you let go of a ball on Earth, it falls down because of gravity.
When you swing around on a swing, you stay up because of the balance between your motion and gravity pulling you back.
A planet like Mars stays in its orbit because the Sun’s gravity pulls it in, but Mars keeps moving sideways so it doesn’t crash into the Sun.

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Categories: Physics · gravity,planets,space