A faint magenta world too dim for ground telescopes turned out to be hiding clouds of salt — and a lesson about how astronomers read alien skies.

Webb's deepest spectrum of a 'little red dot,' GLIMPSE-17775, points to a supermassive black hole cloaked in dense gas, a possible answer to two cosmic puzzles.

On a tidally locked gas giant, Webb told dawn from dusk, finding the evening edge hotter and the air chemistry different across the planet's two faces.