How Does a Planet Stay in Orbit Around a Star?

Imagine a planet is like a ball being swung around on a string. The star pulls the planet toward it, that's gravity. But the planet keeps moving forward, just like you keep moving when you're on a swing. This balance between gravity and motion keeps the planet in orbit. It’s like playing tug-of-war with the sun, both are pulling, but neither wins!

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Examples

Imagine swinging around on a playground swing, you’re pulled down by gravity but keep moving forward.
A ball tied to a string and spun in circles stays at a distance from the center because of its motion.
You're like Earth, the Sun pulls you, but your sideways speed keeps you from falling straight in.

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Categories: Physics · Orbit,Gravity,Planets