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Supernova dust may be behind one of JWST's biggest puzzles

Summary by Phys.org
Astronomers may have found an explanation for one of the biggest mysteries revealed by the James Webb Space Telescope (JWST): why so many galaxies in the early universe appear unexpectedly bright in ultraviolet light. The new study, posted to the arXiv preprint server on May 11, suggests that galaxies more than 13 billion years ago were filled with an unusual kind of dust produced directly by supernova explosions, which could help explain why ga…

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Phys.org broke the news in United Kingdom on Monday, May 18, 2026.
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