There’s a type of exoplanet that astronomers sometimes refer to as cotton candy planets, or super-puffs. They’re mysterious, because their masses don’t match up with their extremely large radii. The two characteristics imply a planet with an extremely low density. In our Solar System, there’s nothing like them, and finding them in distant solar systems … Continue reading Are Low Density “Cotton Candy” Exoplanets Actually Just Regular Planets With Rings?