XKCD comic #3083 "Jupiter Core" Transcript & explanation by ExplainXKCD https://www.explainxkcd.com/wiki/index.php/3083:_Jupiter_Core Transcript: Current leading theories for what's in the center of Jupiter: [Variations of Jupiter, except for the last are shown with about 1/8 of the planet chopped off to show the core.] [Jupiter with liquid material at its core] Diffuse mix of heavy elements and metallic hydrogen [Jupiter with a rocky core] Rocky core with metallic, hydrogen mantle [Jupiter with a pile of coins for a core, with multiple dollar signs shown] Valuable treasure [Jupiter with Earth for a core] Emergency backup Earth [Hollow Jupiter with a rocky planet in the middle] Regular planet pretending to be a gas giant to avoid attention [Jupiter with a smooth ball for a core] Hard ball from avocado [Jupiter with a small version of Jupiter for a core] Baby Jupiter, still gestating [Jupiter as a flat circle, with nothing chopped off] No core; flat Earth conspiracists are wrong about Earth but right about Jupiter title text: Juno mission data suggests that Jupiter actually contains Matryoshka doll-style nested copies of every other planet in the Solar System. explanation (truncated to fit alt text): Jupiter is the largest planet in the Solar System, the fifth planet from the Sun, and the closest-in gas giant. The core of the planet is hidden by an enormous gaseous atmosphere, and this comic lists a number of theories about the structure of that core. [...]