Hubble survey links metal-poor massive stars to Webb's puzzling early galaxies
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A University of Utah-led Hubble survey, TEMPOS, used ultraviolet data to study massive stars in metal-poor dwarf galaxies like those in the early universe. Researchers found stellar winds weaken sharply at very low metallicities and iron abundance varies widely, which may explain unexpectedly complex galaxies seen by the James Webb Space Telescope. Published Sept. 21, 2026, in The Astrophysical Journal Supplement Series.
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