What Are the Differences Between Comets and Asteroids?

Comets are like snowballs from the cold, far reaches of space, and asteroids are more like rocks that travel around the solar system. When comets get close to the Sun, they warm up and release gas and dust, making them shine bright in the sky, kind of like a glittery snowball melting in the sun. Asteroids stay rock solid even when they’re near the Sun, so they don’t glow as much.