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JWST uncovers rare ultra-hot Neptune LTT 9779 b's exotic atmosphere

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Summary
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88% Informative

LTT 9779 b resides in the so-called hot Neptune desert, a category of planets where exceptionally few are known to exist.

The planet's dayside hosts reflective clouds on its cooler western hemisphere, creating contrast to the hotter eastern side.

The team proposed that the uneven distribution of heat and clouds is driven by powerful winds that transport heat around the planet.

More information: Louis-Philippe Coulombe et al, Highly reflective white clouds on the western dayside of an exo-Neptune, Nature Astronomy ( 2025 ). DOI: 10.1038 /s41550-025-02488-9 Provided by University of Oxford .

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93

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formal

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English

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66

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long-living

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