Isn't this a great picture of the planet Neptune?  Just look at the blue color.

That's because it's atmosphere is made up of a certain gas that reflects the color blue. Do you know what the name of that gas is?  Also, as you can see, there is a big dark circle on the planet...that's actually a storm. It's been there for what is believed to be hundreds of years! (Pretty long storm, huh?) Don't you just wonder how a storm can last that long?

 Planets