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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/coreyspowell/statuses/111049046015734469">Corey S Powell (coreyspowell@mastodon.social)'s status on Tuesday, 12-Sep-2023 09:07:42 JST</a><a href="https://mastodon.social/@coreyspowell" title="coreyspowell@mastodon.social"><img src="https://gnusocial.jp/avatar/32826-48-20221119233213.webp" width="48" height="48" alt="Corey S Powell" style="position: absolute; left: 0; top: 0;">Corey S Powell</a></section><article><p>New observations boost the case that alien world K2-18b is a "Hycean exoplanet," a warm water world with a thick atmosphere. And there *might* be a hint of something even more exciting--a chemical sign of life. <br><a href="https://mastodon.social/tags/science" rel="tag">#science</a> <a href="https://mastodon.social/tags/JWST" rel="tag">#JWST</a> <a href="https://mastodon.social/tags/life" rel="tag">#life</a> <br><a href="https://webbtelescope.org/contents/news-releases/2023/news-2023-139" rel="nofollow noreferrer">https://webbtelescope.org/contents/news-releases/2023/news-2023-139</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/2049088#notice-4020867">In conversation</a><time datetime="2023-09-12T09:07:42+09:00" title="Tuesday, 12-Sep-2023 09:07:42 JST">Tuesday, 12-Sep-2023 09:07:42 JST</time> <span>from <span><a href="https://mastodon.social/@coreyspowell/111049046015734469" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@coreyspowell/111049046015734469">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/1508500">Untitled attachment</a></label><br></li><li><label><a rel="external" href="https://gnusocial.jp/attachment/1509565">Spectra of K2-18 b, obtained with Webb’s NIRISS (Near-Infrared Imager and Slitless Spectrograph) and NIRSpec (Near-Infrared Spectrograph) displays an abundance of methane and carbon dioxide in the exoplanet’s atmosphere, as well as a possible detection of a molecule called dimethyl sulfide (DMS).
The detection of methane and carbon dioxide, and shortage of ammonia, are consistent with the presence of an ocean underneath a hydrogen-rich atmosphere in K2-18 b.</a></label><br><a href="https://files.mastodon.social/media_attachments/files/111/049/045/292/990/110/original/76fa6466670ba7bb.jpg" rel="external">https://files.mastodon.social/media_attachments/files/111/049/045/292/990/110/original/76fa6466670ba7bb.jpg</a></li></ol></footer></blockquote>

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Corey S Powell (coreyspowell@mastodon.social)'s status on Tuesday, 12-Sep-2023 09:07:42 JST Corey S Powell
New observations boost the case that alien world K2-18b is a "Hycean exoplanet," a warm water world with a thick atmosphere. And there *might* be a hint of something even more exciting--a chemical sign of life.
#science #JWST #life
https://webbtelescope.org/contents/news-releases/2023/news-2023-139
In conversationTuesday, 12-Sep-2023 09:07:42 JST from mastodon.socialpermalink
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2. Spectra of K2-18 b, obtained with Webb’s NIRISS (Near-Infrared Imager and Slitless Spectrograph) and NIRSpec (Near-Infrared Spectrograph) displays an abundance of methane and carbon dioxide in the exoplanet’s atmosphere, as well as a possible detection of a molecule called dimethyl sulfide (DMS). The detection of methane and carbon dioxide, and shortage of ammonia, are consistent with the presence of an ocean underneath a hydrogen-rich atmosphere in K2-18 b.
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