Webb Space Telescope finds water in the air of exotic ‘sub-Neptune’ exoplanet

NASA’s James Webb Space Telescope has detected water vapor in the atmosphere of TOI-421 b, a scorching sub-Neptune planet about 244 light-years away.

This marks a breakthrough in studying these mysterious planets, which have no equivalent in our solar system.

Unlike previous sub-Neptunes that showed featureless spectra likely due to haze, TOI-421 b’s hot, clear atmosphere revealed water, possible carbon monoxide and sulfur dioxide, and a hydrogen-rich composition similar to its host star, Space.com has reported.

The findings challenge existing theories and offer new insights into how sub-Neptunes form and evolve.

read more: https://www.space.com/astronomy/james-webb-space-telescope/james-webb-space-telescope-finds-water-in-the-air-of-exotic-sub-neptune-exoplanet

💧 Water vapor found on a planet 244 light-years away! What do you think it means?

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