‘Super-puff’ planets lighter than candy floss

Data from NASA’s TESS (Transiting Exoplanet Survey Satellite) mission has revealed two super-rare, ‘super-puff’ planets. Though as big as Jupiter, TOI-791 b and TOI-791 c “have densities comparable to a nice blob of shaving foam, fresh from the can,” says astrophysicist George Dransfield.