Data from NASA's TESS (Transiting Exoplanet Survey Satellite) mission has revealed two new "super-puff" planets with densities comparable to cotton candy. Scientists calculate the Jupiter-sized planets, named TOI-791 b and TOI-791 c, are the "puffiest" planets ever discovered, the agency said. The planets orbit a Sun-like star named TOI-791 that is approximately 1,113 light-years away from Earth.