Great, interesting study!😊😀
"Multiscale astrobiology with the Vera C. Rubin Observatory Legacy Survey of Space and Time"
https://frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2025.1594485/full
#Astrobiology #RubinObservatory #science #Exoplanet #Biosignature #life #universe #LSST
#Biosignature
NASA’s Perseverance Mars Rover to Take Bite Out of ‘Krokodillen’
The area has been on the Perseverance science team’s wish list because it marks an important boundary between the oldest rocks of Jezero Crater’s rim and those of the plains beyond the crater
https://www.jpl.nasa.gov/news/nasas-perseverance-mars-rover-to-take-bite-out-of-krokodillen
#Mars #Perseverance #Krokodillen #NorthernRimCampaign #JezeroCrater #space #science #geology #PerseveranceRover #Mars2020 #biosignature #astrobiology #life #news
The recent claims of #biosignature detection in the atmosphere of #exoplanet K2-18b does not convince anyone.
A new paper demonstrates that other non-biological interpretations can also explain the data.
Reanalysing the dataset used in the original biosignature detection paper through multiple other models reveals good fits for models that abiological processes could entirely explain.
One particular model that included the hydrocarbon propyne fit the data better than the model containing DMS and its cousin, dimethyl disulfide (DMDS), which was interpreted as biosignature detection April.
#astronomy #exoplanets
https://phys.org/news/2025-05-ways-atmosphere-k2-18b.html
https://sailing-dulce.nl/home/article-8867 #stroomuitvalspanje #exoplanetk218b #biosignature #PFAS #europesewijn Dinsdag 29-04-2025 Wat veroorzaakte gisteren 'de grootste electriciteitsuitval ooit op' het Iberisch schiereiland? Er wordt intensief naar gezocht; de theorie die je het meeste hoort gaat over 'geïnduceerde atmosferische trillingen’, schrijft de NRC vanmorgen. Het schijnt vaker voor te komen maar niet op zo grote schaal. De temperaturen in het Spaanse binnenland waren weliswaar rond de 30 graden, maar..
“The idea of searching for resulting ‘ #technosignatures’ as remotely detectable evidence of #extraterrestrial #technology follows the same logic as exoplanet #biosignature #science” aeon.co/essays/why-w...
Why we’re searching for alien ...
Here the red dwarf #K2-18 photographed last night 17th April 2025 from observatory Y71 Makroskooppi. The Webb telescope has detected possible #biosignature signal of dimethyl sulfide/DMS/DMDS gas in the atmosphere of the super-Earth-sized #exoplanet #K2-18b orbiting it.
The star K2-18 is located under the constellation Leo. In this image, there is a field of view around the star about the size of the moon, the brighter star to the right of K2-18 is HIP 56079 with a brightness of 6.7mag.
Astronomers have detected the most promising signs yet of a possible #biosignature outside the solar system, although they remain cautious.
They have detected the chemical fingerprints of dimethyl sulfide and/or dimethyl disulfide, in the #atmosphere of the #exoplanet K2-18b, which orbits its star in the #habitable zone.
On Earth, theyare only produced by #life, primarily microbial life such as marine phytoplankton.
#astronomy #astrobiology
https://www.cam.ac.uk/stories/strongest-hints-of-biological-activity
“But the authors do claim to have found the best evidence to date of a possible “ #biosignature” on a #planet far from our #solarsystem.” www.washingtonpost.com/science/2025...
Webb telescope detects a possi...
So far today, every news report I've read about #exoplanet K2-18b has got its size and distance wrong, and has described the #biosignature chemicals DMS and DMDS as gases (on Earth, they're both colourless, flammable liquids).
It makes you wonder how accurate all the other stories on the news are...
What if we Find Nothing? Bayesian Analysis of the Statistical Information of Null Results in Future Exoplanet Habitability and #Biosignature Surveys: https://iopscience.iop.org/article/10.3847/1538-3881/adb96d -> What if we find nothing in our search for life beyond Earth? https://www.seti.org/press-release/what-if-we-find-nothing-our-search-life-beyond-earth -> In the search for life on exoplanets, finding nothing is something too: https://www.phys.ethz.ch/news-and-events/d-phys-news/2025/04/in-the-search-for-life-on-exoplanets-finding-nothing-is-something-too.html - what insights can be gained from a 'no life detected' scenario in future exoplanet surveys.
The upcoming extremely large telescopes will provide the first opportunity to search for signs of #habitability and #life on non-transiting #terrestrial #exoplanets.
For the most accessible nearby target, #Proxima Centauri b, we may be able to rule out a sub-Neptune #atmosphere in as little as a single hour of observing, and some #biosignature disequilibrium pairs may be accessible in 10 hours.
TZ extended birthday wishes to SETI, offering a glimpse into their intriguing investigations
@1000003.bsky.social
We discovered a potential #biosignature in #Jezero.
Tom speculated his name might be Mortimer.
Does This Mars Rock Show a "Potential Biosignature"? Or Just "Wet Chemistry"?
“Leopard spots” on a Mars rock could come from life — or they could simply be a sign of a type of chemical reaction that requires water.
#life #Mars #chemistry #biosignature
https://skyandtelescope.org/astronomy-news/mars-rock-potential-biosignature-wet-chemistry/
"We cannot say right now that we have discovered #LifeOnMars,” Katie Stack Morgan, the deputy project scientist, said. "But what we are saying is that we have a potential #biosignature, which is a set of features that could have a biological origin but do need further study and more data.
#NASA's #Perseverance rover found a rock on #Mars that could indicate #AncientLife
https://www.msn.com/en-us/news/technology/nasas-perseverance-rover-found-a-rock-on-mars-that-could-indicate-ancient-life/ar-BB1qGCi4
Chemical disequilibrium quantified using the available free energy has previously been proposed as a potential #biosignature.
Atmospheric retrieval coupled with thermodynamical modelling can help assess the detectability of chemical disequilibrium signatures of Earth-like #exoplanets.
Such approaches could yield the first biosignature detections in #exoplanet atmospheres.
#astrobiology #astronomy
https://www.nature.com/articles/s41550-023-02145-z
We are inching closer and closer to reliably detecting #biosignatures on distant #planets.
Much of the focus is on determining which chemicals indicate #life's presence.
But life can also create free energy in a system, and excess energy can create chemical disequilibrium. That's what happened on Earth when life got going.
Could chemical disequilibrium be a #biosignature?
#astronomy #astrobiology #exoplanets
https://phys.org/news/2023-11-life-easiest-planets-earlier-earth.html
Paper by Young et al. (2023):
https://arxiv.org/abs/2311.06083
Mid-Phanerozoic Exoplanets Might Be Easier to Detect than Modern Earth
In a new study, astronomers modeled the atmospheric composition and transmission spectra of five stages in Earth’s Phanerozoic Eon. Two key biosignature pairs — oxygen and methane, and ozone and methane — appeared stronger in models of Earth roughly 100 million to 300 million years ago, when oxygen levels were significantly higher.
https://www.sci.news/astronomy/mid-phanerozoic-exoplanets-12417.html #MidPhanerozoic #Exoplanets #Detection #biosignature #oxygen #methane #ozone
We Just Found a Molecule on Another World...and Only Living Organisms Can Produce It - Popular Mechanics
Could be most conclusive evidence of extraterrestrial biosignature. More study needed.
@bookstodon @religion #bookstodon #ChristianSciFiNightWithProfessorK #AmWritingScienceFiction #SecretSciFiNetwork #alien #biosignature #JWST https://apple.news/AsTC27n0fQjymuQ4iEtnxAg
First post for my new blog: We’re ready to detect exoplanet bio signatures. But are we ready to interpret them?
https://negativeentropy.substack.com/p/inkblot-aliens
#science #exoplanets #Astronomy #biosignature #astrobiology
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