Five hundred and twenty light-years away, in the constellation Sextans, a planet so puffed and tenuous it barely deserves the word 'solid' briefly held the record for the fastest winds ever measured beyond our solar system—33,000 kilometres per hour, extracted not from any image but from the subtle colour-shifts of molecules in starlight. WASP-127b's reign lasted only 28 days before another world surpassed it, yet the real achievement was not the record itself but the method: Doppler spectroscopy had learned to treat a pinpoint of light as a place with an equator, two distinct limbs, and a gen