Researchers have identified a pair of exceptionally low-density gas giants that defy existing astronomical theories regarding how massive planets form. These super-puff worlds, located 1,110 light-years away, possess vast radii despite having only a small fraction of Jupiter's mass.

Researchers have identified two giant exoplanets with densities comparable to shaving foam, marking them as some of the lightest worlds ever discovered. These rare super-puffs challenge existing models regarding how giant planets form.