TOI-270 d: 'Rosetta Stone' Exoplanet
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Mysterious atmosphere of 'Rosetta Stone' exoplanet

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Southwest Research Institute -led study modeled the chemistry of TOI-270 d, an exoplanet between Earth and Neptune in size, finding evidence that it could be a giant rocky planet shrouded in a thick, hot atmosphere.
TOI d is only 73 light years from Earth and could serve as a 'Rosetta Stone' for understanding an entire class of new planets.
Story Source: Journal Reference: - Christopher R. Glein , Xinting Yu , Cindy N. Luu . Deciphering Sub-Neptune Atmospheres : New Insights from Geochemical Models of TOI-270 d. Astrophysical Journal (submitted to arXiv), 2025 DOI: 10.48550 /arXiv.2504.09752 Cite This Page:.
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