NASA Unveils New Insights on 'Fluffy' Exoplanet WASP-107 b

Advanced data reveals that tidal heating and a massive core contribute to the planet's unusually low density and high internal temperature.

WASP-107 b, a gas giant 200 light-years away, has a density comparable to a microwaved marshmallow.
The James Webb Space Telescope data shows the planet's core is much hotter and more massive than previously thought.
Low methane levels in the atmosphere suggest vigorous mixing of hot and cooler gases within the planet.
Tidal heating, caused by the planet's elliptical orbit, is likely responsible for its high internal temperature.
These findings help explain the formation and characteristics of other low-density exoplanets.