#k218b — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #k218b, aggregated by home.social.
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Um estudo do NASA's Goddard Space Flight Center indica que a detecção de biossinais no exoplaneta K2-18b pode não refletir a forma de vida mais comum no universo, sugerindo que sinais detectáveis vêm de planetas com características extremas.
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Hints of Life on Distant World K2-18b Meet Skepticism
Scientists question if life exists on exoplanet K2-18b after new data analysis shows no clear evidence for life-linked molecules.
#K218b, #Exoplanet, #SpaceLife, #JWST, #ScienceNews
https://newsletter.tf/k2-18b-life-signs-questioned-by-scientists/
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New analysis of data from K2-18b shows no clear signs of life molecules, unlike earlier reports. This is a big change from previous excitement.
#K218b, #Exoplanet, #SpaceLife, #JWST, #ScienceNews
https://newsletter.tf/k2-18b-life-signs-questioned-by-scientists/ -
Pesquisadores que buscaram sinais de vida no exoplaneta K2-18b, a 124 anos-luz da Terra, não encontraram evidências de transmissões artificiais. O estudo, realizado com radiotelescópios avançados, também aprimorou técnicas de filtragem de dados.
🔗 https://omniletters.com/busca-sinais-vida-k2-18b/
#exoplanetas #vidaextraterrestre #astronomia #k218b #pesquisa
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Search for Alien Radio Signals on K2-18b Yields No Evidence of Civilization
Search for alien radio signals on K2-18b in February 2025 found no signs of civilization, despite earlier hopes from JWST data.
#K218b, #AlienLife, #SETI, #Exoplanet, #RadioSignals
https://newsletter.tf/k2-18b-radio-signal-search-no-alien-civilization-february-2025/
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A recent radio signal search on exoplanet K2-18b found no signs of alien life. This is different from earlier hopes based on JWST data.
#K218b, #AlienLife, #SETI, #Exoplanet, #RadioSignals
https://newsletter.tf/k2-18b-radio-signal-search-no-alien-civilization-february-2025/
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Have we found evidence of alien life on K2-18b?
New atmospheric data from this potentially ocean-covered exoplanet is fueling serious #Astrobiology debate. Are these true biosignatures — or scientific overreach?
Science fiction meets real #Cosmology.
Read more 👇
https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/ -
If you've got pre-teens in your lives, check out the Feb #Alien edition of Aquila, with #comic artist Edward Ross & me. We visit #K2-18b, aka "The Planet of the Plankton", to see how #JWST detects chemicals on distant planets, & show that sensational science reporting isn't always to be believed.🔭🧪
RE: https://bsky.app/profile/did:plc:67bgg4j34njbopitm62cvddy/post/3lmy5sdsv5s27 -
If you've got pre-teens in your lives, check out the Feb #Alien edition of Aquila, with #comic artist Edward Ross & me. We visit #K2-18b, aka "The Planet of the Plankton", to see how #JWST detects chemicals on distant planets, & show that sensational science reporting isn't always to be believed.🔭🧪
RE: https://bsky.app/profile/did:plc:67bgg4j34njbopitm62cvddy/post/3lmy5sdsv5s27 -
The project includes cases such as exoplanet #K218b, phosphine on #Venus, Tabby's Star, #Oumuamua, and #3IATLAS. Each video is currently being coded in terms of risk and benefit narratives, sources, science actors and evaluations, and frames of (un)certainty.
The group is using computational methods to analyze thousands of user comments on public videos to investigate reactions to discovery in terms of sentiment and other aspects.
#PostDetection #SETI #SocialScience #ScienceCommunication #STS
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The project includes cases such as exoplanet #K218b, phosphine on #Venus, Tabby's Star, #Oumuamua, and #3IATLAS. Each video is currently being coded in terms of risk and benefit narratives, sources, science actors and evaluations, and frames of (un)certainty.
The group is using computational methods to analyze thousands of user comments on public videos to investigate reactions to discovery in terms of sentiment and other aspects.
#PostDetection #SETI #SocialScience #ScienceCommunication #STS
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Where science meets sci-fi 🛸
Researchers studying exoplanet K2-18b have found possible signs of alien life — a discovery that blurs the line between fiction and reality.
Are we finally closing in on proof that life exists beyond Earth? Or are we seeing what we want to see?
Read more on the latest #exoplanet findings and the ongoing truth-vs-fiction debate 👇
🔗 https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
#Science #Space #Astrobiology #AlienLife #K218b #Exoplanet #Physics #Cosmology #SciFi #Universe
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Where science meets sci-fi 🛸
Researchers studying exoplanet K2-18b have found possible signs of alien life — a discovery that blurs the line between fiction and reality.
Are we finally closing in on proof that life exists beyond Earth? Or are we seeing what we want to see?
Read more on the latest #exoplanet findings and the ongoing truth-vs-fiction debate 👇
🔗 https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
#Science #Space #Astrobiology #AlienLife #K218b #Exoplanet #Physics #Cosmology #SciFi #Universe
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K2-18b: почему научная осторожность важнее сенсационных заголовков
В сентябре 2023 года мир облетела новость: на далекой экзопланете K2-18b, вращающейся вокруг красного карлика в 124 световых годах от нас, возможно, обнаружены признаки жизни. Поводом стало предполагаемое обнаружение в ее атмосфере газа диметилсульфида (ДМС), который на Земле производится исключительно живыми организмами. Однако научное сообщество встретило такие заявления с крайней осторожностью. Исследование, опубликованное в The Astronomical Journal , дает трезвый и методичный анализ данных по K2-18b и приходит к выводу: нынешние доказательства не соответствуют строгим стандартам, которые требуются для заявлений о потенциальных биосигнатурах.
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Where Science Meets Sci-Fi: Alien Life on K2-18b? 🌌👽
Cosmologists studying #K218b may have found circumstantial evidence of extraterrestrial life. Could science fiction finally be becoming reality—or is it just a cosmic illusion?
Explore the possibilities of #AlienLife, why this discovery matters, and what it could mean for our understanding of the #Universe.
🔗 https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
#Cosmology #Astrophysics #SpaceExploration #Science #Exoplanets #ET #SciFi
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Where Science Meets Sci-Fi: Alien Life on K2-18b? 🌌👽
Cosmologists studying #K218b may have found circumstantial evidence of extraterrestrial life. Could science fiction finally be becoming reality—or is it just a cosmic illusion?
Explore the possibilities of #AlienLife, why this discovery matters, and what it could mean for our understanding of the #Universe.
🔗 https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
#Cosmology #Astrophysics #SpaceExploration #Science #Exoplanets #ET #SciFi
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Where science and sci-fi collide. Does alien list exist on alien worlds? Have we finally found evidence of it?
🔗 | https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
Cosmologists studying exoplanet k2-18b have discovered circumstantial evidence of alien life living on the exoplanet. A long held theme in sci-fi finally gains traction for real, but is all as it seems?
#physics #cosmology #science #universe #k218b #space #ET #hindsightstation
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Where science and sci-fi collide. Does alien list exist on alien worlds? Have we finally found evidence of it?
🔗 | https://authormulhall.com/alien-life-on-k2-18b-societys-truth-vs-fiction-debate/
Cosmologists studying exoplanet k2-18b have discovered circumstantial evidence of alien life living on the exoplanet. A long held theme in sci-fi finally gains traction for real, but is all as it seems?
#physics #cosmology #science #universe #k218b #space #ET #hindsightstation
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[Перевод] Ближайшая суперземля K2-18 b может быть океанической планетой
«Это, безусловно, увеличивает шансы на её обитаемость и подтверждает, что K2-18 b — наш лучший шанс изучить потенциальную пригодную для жизни среду за пределами Солнечной системы на данный момент». 31.07.2025, Роберт Ли , space.com
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And it turns out, no sings of life on planet K2-18b.
// Article in French //
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Et il se trouve, pas de signe de vie sur la planète K2-18b.https://www.sciencepresse.qc.ca/actualites-scientifiques/2025/07/30/preuves-vie-k2-18b
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And it turns out, no sings of life on planet K2-18b.
// Article in French //
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Et il se trouve, pas de signe de vie sur la planète K2-18b.https://www.sciencepresse.qc.ca/actualites-scientifiques/2025/07/30/preuves-vie-k2-18b
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Insufficient evidence for DMS and DMDS in the atmosphere of #K218b - from a joint analysis of JWST NIRISS, NIRSpec, and MIRI observations: https://arxiv.org/abs/2505.13407 -> Possible sign of life in deep space faces new doubts: https://news.uchicago.edu/story/possible-sign-life-deep-space-faces-new-doubts - UChicago analysis of new and old data suggests the signal is weak and explainable by other molecules.
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Insufficient evidence for DMS and DMDS in the atmosphere of #K218b - from a joint analysis of JWST NIRISS, NIRSpec, and MIRI observations: https://arxiv.org/abs/2505.13407 -> Possible sign of life in deep space faces new doubts: https://news.uchicago.edu/story/possible-sign-life-deep-space-faces-new-doubts - UChicago analysis of new and old data suggests the signal is weak and explainable by other molecules.
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https://www.cam.ac.uk/stories/strongest-hints-of-biological-activity
"On Earth, DMS and DMDS are only produced by life, primarily microbial life such as marine phytoplankton. While an unknown chemical process may be the source of these molecules in #K218b 's atmosphere, the results are the strongest evidence yet that life may exist on a planet outside our solar system."
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https://www.cam.ac.uk/stories/strongest-hints-of-biological-activity
"On Earth, DMS and DMDS are only produced by life, primarily microbial life such as marine phytoplankton. While an unknown chemical process may be the source of these molecules in #K218b 's atmosphere, the results are the strongest evidence yet that life may exist on a planet outside our solar system."
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Une mise au point bienvenue sur les annonces fracassantes de traces de vie sur #k218b L'aphorisme de Carl Sagan, "extraordinary claims require extraordinary evidence" (les prétentions extraordinaires nécessitent des preuves extraordinaires), est plus que jamais d'actualité.
https://www.lemonde.fr/sciences/article/2025/05/13/potentielle-presence-de-vie-sur-l-exoplanete-k2-18b-anatomie-d-un-faux-positif_6605670_1650684.html -
In the News: https://www.seti.org/seti-institute-news-april-roundup
April was an exciting month at the SETI Institute, full of discoveries that push the boundaries of our understanding of life beyond Earth, including #exoplanet #K218b, #Mars and its carbonates, plus #Phobos, #Deimos, and a mudball #meteorite.
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In the News: https://www.seti.org/seti-institute-news-april-roundup
April was an exciting month at the SETI Institute, full of discoveries that push the boundaries of our understanding of life beyond Earth, including #exoplanet #K218b, #Mars and its carbonates, plus #Phobos, #Deimos, and a mudball #meteorite.
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Astronomers have found hints of possible life-related chemicals in the atmosphere of the distant planet K2-18b, but stronger evidence is still needed to confirm whether it harbors life. https://www.japantimes.co.jp/commentary/2025/04/28/world/space-did-we-find-life/?utm_medium=Social&utm_source=mastodon #commentary #worldnews #k218b #space #life #hubblespacetelescope #nasa
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Astronomers have found hints of possible life-related chemicals in the atmosphere of the distant planet K2-18b, but stronger evidence is still needed to confirm whether it harbors life. https://www.japantimes.co.jp/commentary/2025/04/28/world/space-did-we-find-life/?utm_medium=Social&utm_source=mastodon #commentary #worldnews #k218b #space #life #hubblespacetelescope #nasa
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Is there really life on planet K2-18b? We can’t rule it out, but some key questions must be answered | Nathalie Cabrol
A new study of a sphere orbiting a red dwarf star 124 light years from Earth is raising hopes. Here’s why the evidence is inconclusive: https://www.theguardian.com/commentisfree/2025/apr/22/life-on-another-planet-k2-18b-science
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Is there really life on planet K2-18b? We can’t rule it out, but some key questions must be answered | Nathalie Cabrol
A new study of a sphere orbiting a red dwarf star 124 light years from Earth is raising hopes. Here’s why the evidence is inconclusive: https://www.theguardian.com/commentisfree/2025/apr/22/life-on-another-planet-k2-18b-science
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Hace muy poco (17 de abril) hallamos la evidencia más cercana de que hay vida en otras partes del Universo aparte de en la Tierra, algo que, por otra parte, es matemáticamente imposible negar. Gracias al telescopio espacial James Webb, que tanta información valiosa nos está mostrando desde su puesta en marcha a finales de 2021, las biofirmas del exoplaneta K2-18b, situado a 124 años de luz de nosotros (en la constelación de Leo), presenta hasta un 99,7% de probabilidades de vida, un aplastante porcentaje reforzado por un mundo oceánico potencialmente receptor de vida microbiana. Las sustancias halladas (dimetilsulfuro y dimetil disulfuro) solo son producidas por seres vivos marinos (al menos en la Tierra), como algas y fitoplancton. Estas sustancias ya fueron detectadas en 2023 en la atmósfera, pero ha sido ahora cuando científicos británicos y estadounidenses han fijado el porcentaje en el 99,7%. K2-18b es 2,5 veces más grande que la Tierra y orbita su estrella en una zona intermedia, propia de los planetas con potencial de habitabilidad. A pesar de ser una gran promesa, los científicos se mantienen cautos y expresan su necesidad de seguir investigando.
Fuentes: DW | El Cronista
Foto: Wiki -
Hace muy poco (17 de abril) hallamos la evidencia más cercana de que hay vida en otras partes del Universo aparte de en la Tierra, algo que, por otra parte, es matemáticamente imposible negar. Gracias al telescopio espacial James Webb, que tanta información valiosa nos está mostrando desde su puesta en marcha a finales de 2021, las biofirmas del exoplaneta K2-18b, situado a 124 años de luz de nosotros (en la constelación de Leo), presenta hasta un 99,7% de probabilidades de vida, un aplastante porcentaje reforzado por un mundo oceánico potencialmente receptor de vida microbiana. Las sustancias halladas (dimetilsulfuro y dimetil disulfuro) solo son producidas por seres vivos marinos (al menos en la Tierra), como algas y fitoplancton. Estas sustancias ya fueron detectadas en 2023 en la atmósfera, pero ha sido ahora cuando científicos británicos y estadounidenses han fijado el porcentaje en el 99,7%. K2-18b es 2,5 veces más grande que la Tierra y orbita su estrella en una zona intermedia, propia de los planetas con potencial de habitabilidad. A pesar de ser una gran promesa, los científicos se mantienen cautos y expresan su necesidad de seguir investigando.
Fuentes: DW | El Cronista
Foto: Wiki -
[Перевод] Новые открытия возрождают дебаты о жизни на других планетах
17.04.2025, Алан Бойл, cosmiclog.com Два новых исследования вызвали новые дебаты о далекой планете со странной атмосферой. В одном из исследований утверждается, что существуют дополнительные доказательства наличия жизни на планете K2-18 b, основанные на химических признаках. В другом исследовании утверждается, что такие признаки могут быть получены на безжизненном мире, покрытом горячей магмой.
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🪐🔭 K2-18b podría tener señales de vida. El hallazgo más prometedor fuera de la Tierra.
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@SeanPLynch And here is the transmission data from the original paper (creative commons license):
https://iopscience.iop.org/article/10.3847/2041-8213/adc1c8
New Constraints on DMS and DMDS in the Atmosphere of K2-18 b from JWST MIRI
Nikku Madhusudhan, Savvas Constantinou, Måns Holmberg, Subhajit Sarkar, Anjali A. A. Piette, and Julianne I. Moses
The Astrophysical Journal Letters
#JWST #k218b -
@SeanPLynch And here is the transmission data from the original paper (creative commons license):
https://iopscience.iop.org/article/10.3847/2041-8213/adc1c8
New Constraints on DMS and DMDS in the Atmosphere of K2-18 b from JWST MIRI
Nikku Madhusudhan, Savvas Constantinou, Måns Holmberg, Subhajit Sarkar, Anjali A. A. Piette, and Julianne I. Moses
The Astrophysical Journal Letters
#JWST #k218b -
@SeanPLynch From the paper
https://iopscience.iop.org/article/10.3847/2041-8213/adc1c8:"It is widely recognized that the detection of a biosignature is unlikely to be instantaneous or unambiguous in the first instance, rather relying on continued accumulation of evidence..."
"Further work is needed to robustly verify the current findings. More observations are required to robustly demonstrate the repeatability of our present findings, rule out potentially unaccounted-for instrumental systematics, as well as increase the detection significances."
Somehow these (reasonable!) cautious remarks do not square so well with the grandiose-sounding statements of the lead author as quoted by NPR.
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@SeanPLynch From the paper
https://iopscience.iop.org/article/10.3847/2041-8213/adc1c8:"It is widely recognized that the detection of a biosignature is unlikely to be instantaneous or unambiguous in the first instance, rather relying on continued accumulation of evidence..."
"Further work is needed to robustly verify the current findings. More observations are required to robustly demonstrate the repeatability of our present findings, rule out potentially unaccounted-for instrumental systematics, as well as increase the detection significances."
Somehow these (reasonable!) cautious remarks do not square so well with the grandiose-sounding statements of the lead author as quoted by NPR.
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@SeanPLynch A link to the detection claim paper discussed in the npr piece:
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@SeanPLynch A link to the detection claim paper discussed in the npr piece:
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Mi niño interior está emocionadísimo. ¿Hay #vida como la conocemos en el misterioso #planeta K2-18b?
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My inner child is full of joy and wonder. Is there #life as we know it on the mysterious #planet K2-18b?#science #astronomy #exoplanets #exobiology #K218b #ScientificResearch
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Mi niño interior está emocionadísimo. ¿Hay #vida como la conocemos en el misterioso #planeta K2-18b?
🌑
My inner child is full of joy and wonder. Is there #life as we know it on the mysterious #planet K2-18b?#science #astronomy #exoplanets #exobiology #K218b #ScientificResearch
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🔭🌍¿Estamos solos? ¡La señal de vida más fuerte hasta ahora en otro planeta!
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Ist das der bisher stärkste Hinweis für Leben auf einem fernen Planeten?
#Weltraum #Forschung #Leben #Alien #K218b
Golem.de: IT-News für Profis https://www.golem.de/news/james-webb-staerkster-hinweis-auf-ausserirdische-aktivitaeten-entdeckt-2504-195463.html
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Today's top ten tag trends:
10: #fantasticfour
9: #morecowbell
8: #k218b
7: #doorsday
6: #europaleague
5: #ThrowbackThursday
4: #eh22
3: #musiquinta
2: #coys
1: #junkfoodmovies -
Today's top ten tag trends:
10: #fantasticfour
9: #morecowbell
8: #k218b
7: #doorsday
6: #europaleague
5: #ThrowbackThursday
4: #eh22
3: #musiquinta
2: #coys
1: #junkfoodmovies -
Scientists hail ‘strongest evidence’ so far for life beyond our solar system | James Webb space telescope
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Scientists hail ‘strongest evidence’ so far for life beyond our solar system | James Webb space telescope
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[Перевод] Учёные нашли «самое убедительное» из имеющихся свидетельств существования жизни на далёкой планете
Учёные нашли новые, предварительные доказательства того, что на далёком мире, вращающемся вокруг другой звезды, может существовать жизнь. Команда из Кембриджа, изучающая атмосферу планеты под названием K2-18b, обнаружила признаки молекул, которые на Земле вырабатываются только организмами. Это уже второй , и более многообещающий, случай обнаружения химических веществ, связанных с жизнью, в атмосфере планеты с помощью космического телескопа «Уэбб». Однако команда и независимые астрономы подчёркивают, что для подтверждения этих результатов необходимо получить больше данных.
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Обнаружение потенциальных биосигнатур в атмосфере экзопланеты K2-18b — почему не стоит обольщаться
Примечание: на Хабре уже выходила статья с этой новостью, но я решил написать более подробную статью основанную на компиляции нескольких англоязычных источников. В последние дни научное сообщество оказалось в центре внимания из-за публикации данных, указывающих на возможное присутствие биосигнатур в атмосфере экзопланеты K2-18b. Результаты, полученные с помощью космического телескопа «Джеймс Уэбб» (JWST), демонстрируют признаки молекул, которые на Земле ассоциируются с биологической активностью. Хотя выводы требуют дальнейшего подтверждения, это открытие может стать поворотным моментом в поисках жизни за пределами Солнечной системы. K2-18b, находящаяся в 124 световых годах от Земли, в созвездии Льва, вращается вокруг красного карлика K2-18 спектрального класса M2.8, чья светимость составляет всего 2,3% от солнечной. Несмотря на это, из-за близости планеты к звезде (0,142 а.е.) равновесная температура её поверхности оценивается в диапазоне от -73°C до +47°C, что теоретически допускает существование жидкой воды. Однако ключевой проблемой остаётся структура K2-18b: при радиусе в 2,6 земных и массе 8,6 масс Земли её средняя плотность (2,67 г/см³) указывает на наличие протяжённой атмосферы, вероятно, водородно-гелиевой, с возможным глобальным океаном под ней. Такие «гицеанские миры», гипотетически, сочетают черты мини-нептунов и океанических планет, что ставит под вопрос возможность формирования стабильной биосферы. Ранее наблюдения JWST в 2023 году выявили в её атмосфере метан (CH₄) и углекислый газ (CO₂), что усилило интерес к этому объекту.
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Scientist explains how he discovered evidence of life on K2-18b – Channel 4 News
👽Nikku Madhusudhan is Professor of Astrophysics and Exoplanetary Science, at the University of Cambridge.
https://www.channel4.com/news/scientist-explains-how-he-discovered-evidence-of-life-on-k2-18b
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Scientist explains how he discovered evidence of life on K2-18b – Channel 4 News
👽Nikku Madhusudhan is Professor of Astrophysics and Exoplanetary Science, at the University of Cambridge.
https://www.channel4.com/news/scientist-explains-how-he-discovered-evidence-of-life-on-k2-18b
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Astronomers Detect a Signature of Life on a Distant Planet: #K218b https://www.nytimes.com/2025/04/16/science/astronomy-exoplanets-habitable-k218b.html
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übrigens, auf #k218b könnt ihr noch 123 Jahre lang Widerspruch gegen den Bau der galaktischen Autobahn einlegen
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@GundelPundel naja 1 Tesla braucht selbst mit Raketenantrieb noch > 1 Mio Jahre nach #k218b, also wie sagt schon der "Hitchhiker's Guide To The Galaxy" - DON'T PANIC
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Sounds like there could be anything from giant #Lochness #monsters to millions of #capybaras on #k218b
https://www.huffpost.com/entry/life-on-k2-18b_n_6800aa1ce4b0e7e6a3f4daba?origin=top-ad-recirc