400 light-years from Earth a gas giant exoplanet orbits its star in less than a day. WASP-18 b, seen in an illustration, is 10 times more massive than Jupiter. @NASAWebb took a look and found water vapor and made a temperature map (it's HOT). http://go.nasa.gov/42aAivX #NASAExoplanets
Scientists used the Webb Telescope identified water vapor in the atmosphere of WASP-18 b, and made a temperature map of the planet as it slipped behind, and reappeared from, its star.
