What's the coldest planet in the solar system? Uranus Because it's so far away from the Sun, its temperature dips to about -357 F. Unlike Earth, this super-cold planet isn't made up of rock. Instead, it is made up of liquids and gases--including the blue-green gases that give it its beautiful color. Early readers will be taken on a journey through outer space as they learn these and other fascinating facts about Uranus. Each 24-page book features...