https://www.earth.com/news/webb-telescope-detects-water-vapor-on-planet-outside-the-solar-system-toi-421-b/
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Webb telescope detects water vapor on a planet outside the solar system smaller than Neptune - Earth.com
6/5/25 at 5:10pm
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Earth.com
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The Webb telescope detects a clear, hydrogen-rich atmosphere, as well as water vapor, on the hot sub-Neptune planet TOI-421 B.
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