Protostellar jets

Webb's close-up, high-resolution ESA view of Herbig-Haro 211 reveals exquisite details of the young star's jet. Credit: ESA/Webb, NASA, CSA, Tom Ray (Dublin)

Webb photographed supersonic jets from a star of his day

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Herbig-harrows are luminous regions surrounding young stars. They form when stellar winds or jets of gas ejected from these stars create shock waves that collide at high speeds with nearby gas and dust.