<ul><li>The James Webb Space Telescope (JWST) has solved a 20-year-old mystery about how ancient stars could host massive planets.</li><li>Astronomers believed that the lack of heavy elements in the early universe should have prevented the formation of planets around ancient stars.</li><li>However, the JWST observed modern-day stars with few heavy, metallic elements and found that planetary disks can last longer than previously believed.</li><li>This discovery implies that planets have more time to form and grow around these stars than in nearby star-forming regions.</li></ul>

James Webb telescope solves 20-year-old Hubble conundrum — and it could finally explain why the universe's oldest planets exist

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