* The sun is a star: The sun is a giant ball of hot gas, and it's not physically located within our atmosphere like a balloon. It's millions of kilometers away from Earth.
* Gravity: The sun's immense gravity holds all the planets in our solar system in orbit around it. Earth is constantly moving around the sun in a circular path.
* Perspective: The reason we see the sun "rising" and "setting" is due to the Earth's rotation. As our planet spins, it appears as though the sun is moving across the sky, but it's actually our viewpoint changing.
So, the sky doesn't hold the sun up – gravity and the Earth's rotation are responsible for what we see.
