This planet is generating more heat that should be possible from its formation. The current idea is that there is Helium still be differentiated in significant amounts within this planet. It comes down as Helium Rain, continuing to make the interior denser and the exterior less dense. Hint: I'm looking for the planet we are more sure this happens on as mentioned in your book, not all the possible places as mentioned in the article you read. Question 13 options: a) Saturn b) Neptune c) Jupiter d) Uranus