Gravity and Orbit:
* Gravity: Planets are held in their orbits around stars (like our Sun) by the force of gravity. Gravity is a fundamental force of nature that attracts objects with mass towards each other. The Sun's immense mass creates a powerful gravitational pull that keeps the planets in orbit.
* Orbit: An orbit is a curved path that an object takes around another object due to the force of gravity. Planets are constantly falling towards the Sun, but their sideways motion keeps them from actually crashing into it. Think of it like a ball on a string being swung around your head - the ball is always trying to fly away, but the string (gravity) keeps it in a circular path.
In short, gravity is the force that keeps planets in orbit around stars, and they don't need anything else to hold them up.
