Comets

Comets have been around for a very long time, even way back to 240 BC. Comets are sometimes called dirty snowballs, it's a mixture of ice and dust. Also, you can only see comets when they are near the sun. Many people say that Comet Halley is a famous comet and that's because it's true. Sometimes, we might have meteor showers only if the Earth goes through the orbit of a comet. Most, comets are discovered by astronomers. Finally, comets are an interesting thing and should be shown to everyone in the world.