Astronomers find biggest super-puff planets yet that are lighter than cotton candy

Astronomers found two giant “super-puff” planets 1,110 light-years away that are about Jupiter-sized but so diffuse they’re described as lighter than cotton candy.
They’re likely mostly hydrogen and helium (maybe white or blue skies), were spotted by NASA’s TESS, and will get chemical follow-up from the Webb Space Telescope.
Super-puffs are rare—fewer than 40 known—and studying them helps scientists learn how unusual planets form and evolve.