Hey, guys. Do you all know whether is Uranus or Neptune colder? This is because I read an encyclopedia and it stated that Uranus is the coldest planet in the solar system because Neptune will produce its own heat. But when I searched it online, it stated that Neptune is the coldest planet in the solar system. In fact, Neptune is the coldest planet because it is the farthest planet from the sun in the solar system. So, which planet do you guys think is the coldest planet? Please answer my question below. Thank you. ☺ ☺