<ul><li>NASA's James Webb Space Telescope has provided insights into a hot, mysterious exoplanet known as a 'sub-Neptune.'</li><li>The planet, TOI-421 b, is located about 244 light-years away, has temperatures around 1,340 degrees Fahrenheit, and shows a different chemical composition compared to cooler sub-Neptunes.</li><li>Using transmission spectroscopy, astronomers detected water vapor, sulfur dioxide, carbon monoxide, and unexpectedly, a large amount of hydrogen in TOI-421 b's atmosphere.</li><li>The discovery raises questions about the formation and evolution of hot sub-Neptunes and suggests potential new avenues for understanding these common exoplanets in our galaxy.</li></ul>

NASA’s Webb Telescope uncovers secrets of a hot, mysterious exoplanet

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