The exoplanet WASP-127b is an unusual world. It is about 30% larger than Jupiter but has just a fifth of Jupiter’s mass. It is an example of a super-puff planet because of its extremely low density. These puffy worlds are so unusual that we don’t know if they would resemble the gas giants of our solar system, or something more exotic, such as a large super-Earth. But a recent study of WASP-127b shows that super-puff worlds can have tremendous winds.
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