#exoplanet — Public Fediverse posts

https://www.europesays.com/ch/125890/ The SETI Institute And ETH Zurich Join Forces To Search For The Origin Of Life #astrobiology #Astronomy #ETHZurich #exoplanet #OriginOfLife #SETIInstitute #Zürich

#AIP:
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Sterneruptionen im Labor: Erster experimenteller Nachweis für deren Unterdrückung durch starke Magnetfelder
"
".. Nachweis erbracht, dass starke Magnetfelder aktiver Sterne koronale Massenauswürfe vollständig unterdrücken können. .. erklärt, warum massereiche stellare Eruptionen bei Sternen viel seltener beobachtet werden als bei der Sonne. .."

https://www.aip.de/de/news/stellar-eruptions-laboratory-experiment/

21.8.2026

#Astrophysik #CME #Exoplanet #KoronalerMassenauswurf #Magnetfeld #Plasma #Simulation #Stern #Sterneruption

White Paper Makes the Case for a European Exoplanet Interferometer

Like and share if you enjoyed this.

https://1ban.news/life-mission-exoplanet-atmospheres/

#1ban #life #mission #exoplanet #atmospheres #space

RE: https://mastodon.social/@proseandpassion/116935425709917770

Where in #space can #planets with #atmospheres be found? C. Cherubim et al. (2026) used #nearinfraredspectroscopy to characterize a #rocky #exoplanet orbiting its host star within the #habitablezone. Planet #LHS1140b exhibits #helium #absorption in its atmosphere, a feature the authors attribute to a helium-dominated #upperatmosphericlayer.

© #StefanFWirth, July 2026, Berlin

Reference
C. Cherubim et al. (2026)
https://doi.org/10.1126/science.aea9708

The cosmic shoreline concept was introduced to separate #planets with #atmospheres from those without, by relating the cumulative X-ray and extreme-ultraviolet (XUV) instellation to the planetary escape velocity, using the Solar System planets to anchor the empirical relation.

The #exoplanet community has since attempted to refine the cosmic shoreline to provide a consistent ranking or prioritisation tool for exoplanet observations – i.e., to quickly identify which small #planets are most likely to have retained an #atmosphere.

In a new paper, astronomers use an empirical approach to refine the cosmic shoreline concept.

The Empirical Exoplanet Cosmic Shoreline (EECS) exhibits a significantly steeper slope than previously theorized, while consistently categorising Solar System moons and dwarf planets according to their atmospheric properties.

Applied to planets orbiting M dwarfs, the EECS suggests that a larger fraction retain atmospheres than predicted by classical models, but incorporating revised XUV fluence histories for low-mass M dwarfs reveals severe atmospheric vulnerability.

#astronomy #astrobiology
https://astrobiology.com/2026/06/an-empirical-determination-of-the-cosmic-shoreline-2.html

Paper by Meni-Gallardo & Pallé (2026):
https://arxiv.org/abs/2508.12865

#ESO:
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Seltsame Winde liefern bislang stärksten Hinweis auf magnetische Aktivität in Exoplaneten
"
".. einige Planeten außerhalb unseres Sonnensystems Magnetfelder aufweisen könnten. Mithilfe des ..VLT der .. ESO und des Gemini-North-Teleskops haben die Forschenden die Windgeschwindigkeiten auf sieben sehr heißen, Jupiter-ähnlichen Exoplaneten ermittelt. .."

https://www.eso.org/public/germany/news/eso2606/?nolang

2.6.2026

#Astronomie #ESPRESSO #Exoplanet #Gasriese #GeminiNorth #Magnetfeld #Planetologie #VLT #Wind

#JHU:
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Astronomers de-fog exoplanet atmospheres with new cloud-detecting method
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"Discovery by Johns Hopkins researchers of daily cloud cycle on a Hot Jupiter planet provides unique window into its make-up and evolution "

https://hub.jhu.edu/2026/05/21/astronomy-exoplanet-atmospheres-detecting-clouds/

21.5.2026

#Astronomie #astronomy #atmosphere #CloudCycle #Exoplanet #HotJupiter #JWST #WASP17b #WASP39b #WASP94Ab #Weltraumteleskop

TESS Finds Possible New Worlds Using Stellar Eclipses ✨🛰️

#Astrophysics #BinaryStar #Exoplanet #Landsat #Planets #RemoteSensing #Satellite #Space

⏩ 4 new pictures and 3 new videos from NASA (SVS) https://commons.wikimedia.org/wiki/Special:ListFiles?limit=9&user=OptimusPrimeBot&ilshowall=1&offset=20260513130241

#UniBE:
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Zwischen ewiger Nacht und ewigem Tag: Klimakarten zweier Erdverwandter
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"Mit Hilfe des .. JWST ist es einem internationalen Team mit Beteiligung der Universität Bern, der Universität Genf sowie des ..NFS PlanetS gelungen, detaillierte Klimakarten von zwei felsigen Exoplaneten mit erdähnlicher Masse zu erstellen .."

https://mediarelations.unibe.ch/medienmitteilungen/2026/medienmitteilungen_2026/zwischen_ewiger_nacht_und_ewigem_tag_klimakarten_zweier_erdverwandter/index_ger.html

13.4.2026

#Astronomie #Atmosphäre #Bern #Exoplanet #Gezeiten #JWST #Klima #PlanetS #Schweiz #TRAPPIST1 #TRAPPIST1b #TRAPPIST1c #Weltraumteleskop

#ESO:
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Erstes Licht für PoET: Ein strahlender Auftakt für die Exoplanetenforschung
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".. Paranal Solar ESPRESSO Telescope (PoET), installiert am Paranal d. . ESO in Chile, hat .. seine ersten Beobachtungen durchgeführt. .. Teleskop wird in Kombination mit .. ESPRESSO-Instrument .. eingesetzt, um d. Sonne detailliert zu untersuchen. .. "

https://www.eso.org/public/germany/news/eso2605/

9.4.2026

#Astronomie #Chile #ESPRESSO #Exoplanet #FirstLight #Helligkeitsschwankung #Italien #Paranal #PoET #Portugal #Teleskop #VLT

Here is a problem that has been quietly gnawing at astronomers for decades.

The standard approach to detecting #life on other worlds involves scanning #exoplanet #atmospheres for #oxygen, #methane, and #ozone, whose presence is difficult to explain without #biology.

It's a clever idea, but it carries a hidden flaw. That entire shopping list was written by studying Earth. It is, inevitably, a search for life like us.

The list of ways that #chemistry alone can accidentally mimic these #biosignature gases is growing faster than the list of new ways to detect life.

Each new false positive scenario demands even more information about the #planet to rule it out, and there is a genuine question about whether that information can ever be gathered exhaustively.

But there is a solution.

#Assembly theory doesn't ask what #molecules are present in an #atmosphere. Instead, it asks how hard they were to make.

Every molecule can be assigned an assembly index, a minimum number of construction steps required to build it from basic #chemical building blocks.

Simple molecules are easy to assemble by chance, but truly complex ones, requiring many sequential steps, don't arise without something doing a great deal of deliberate selection.

That something would then be life itself.

#astrobiology #astronomy
https://phys.org/news/2026-03-life.html

Paper by Walker et al. (2026): https://arxiv.org/abs/2603.11086

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp.

One of these is whether #Earth is the only place that harbours #life.

In the last 30 years, the question of whether the Sun is unique in hosting a planetary system has been resoundingly answered: we now know of thousands of #exoplanets orbiting other #stars.

But can we use telescopes to detect whether any of these distant worlds also harbour life?

A promising method is to analyse the gases present in the #atmospheres of these #planets.

Astonishingly, we can identify #molecules present in the atmospheres of exoplanets.

Quantum mechanics causes each atmospheric chemical to have its own distinct barcode-like pattern, which it leaves on the light passing through it.

By collecting starlight that has been filtered through an #exoplanet’s atmosphere, telescopes can see the barcodes of the molecules making up that atmosphere.

To take advantage of this, the planet needs to #transit – pass in front of – the star from our point of view.

#astronomy #astrobiology
https://theconversation.com/how-astronomers-plan-to-detect-the-signatures-of-alien-life-in-the-atmospheres-of-distant-planets-272821

I feel like 75% of #exoplanet astronomers get confused by planets in binary systems for some reason...
The simplest configuration is planets orbiting stars which also have a stellar companion. A large fraction of star systems are wide binaries so this is very common, and honestly not that interesting. Imagine if the Sun had an M-dwarf instead of #Planet9. Both stars could even host planets (unless the stellar companion is particularly close/large). Examples: Kepler-444, HD80606, Proxima Cen, etc

Nature Journal astronomy covers

The Search for a Sister Earth (2006) - Designing a telescope to find our next Solar System

https://nature.com/nature/volumes/442/issues/7098

#universe #planet #planets #exoplanet #exoplanets #planethunting #earth #solarsystem #star #stars #simulation #astronomy #astrophysics #astrodon #nature #cover #art #coverart #covers #naturecovers #space #nwo #newworld #newworlds #telescope #spacetelescope #coronograph #science #research #nasa #jwst

"MPIA: Hat der Gesteins-Exoplanet TRAPPIST-1 c eine Atmosphäre?"

"JWST-Beobachtungen belegen, dass TRAPPIST-1 c keine zweite Venus ist. Eine Pressemitteilung des Max-Planck-Instituts für Astronomie."

https://www.raumfahrer.net/mpia-hat-der-gesteins-exoplanet-trappist-1-c-eine-atmosphaere/

#Astronomie #CO2 #Exoplanet #JamesWebbTeleskop #JWST #MIRI #MPIA #Raumfahrt #Sauerstoff #TRAPPIST1c #Weltraumteleskop

19.6.2023

🤗🥳We are very happy to announce that Frank Eisenhauer starts as a new Director at #MPE! With #SINFONI, #GRAVITY & #GRAVITY+, Eisenhauer is building first-class instruments which led to outstanding results in #BlackHole, #GalacticCenter, #Exoplanet & #GalaxyFormation science!
➡https://www.mpe.mpg.de/7948075/news20230515

Long article on the combined #exoplanet hunting method from the previous post in the thread: https://www.expressnews.com/business/article/hunting-planets-san-antonio-astrophysicist-uses-18090895.php - the first author "says combining #astrometry and direct imaging strategies should lead to the discovery of more exoplanets — and he’s already been reviewing data from #Gaia and Hipparcos to get a bead on more catalogued stars with orbiting companions."

"HIP 99770 b is the first #exoplanet ever discovered jointly through direct imaging and #astrometry and the first discovery leveraging on μ-arcsecond precision #Gaia astrometry": https://arxiv.org/abs/2212.00034

A detection of a superjovian #exoplanet around the dusty A star HIP 99770 using precision #astrometry and direct imaging.

The #planet HIP 99770 b is in a low-eccentricity orbit 16.9 au from the primary, receiving about as much light as #Jupiter does from the Sun.

This discovery is a proof-of-concept for a fundamentally new strategy for finding imageable planets: selecting targets based on dynamical evidence from indirect methods like astrometry.

#astronomy #exoplanets https://arxiv.org/abs/2212.00034

Update on the campaign to observe the #transit of #HIP41378 f on Nov. 12. We are one day before !!!

Main observatory statuts:
- #Wendelstein obs. 🟢
- #SOPHIE / #HauteProvence 🟢
- #CARMENES / #CalarAlto 🟢
- #MERCATOR / #LaPalma 🟢
- #HARPS-N / #LaPalma 🟢
- #ESPRESSO / #ESO Paranal 🟢
- #EXPRES / #Lowell 🟢
- #NEID / #KittPeak 🟠
- #MINERVA / #FWLO 🟢
- #HIRES / #MaunaKea 🟢
- #MAROON-X / #MaunaKea 🔴
- #SPIRou / #CFHT 🟢
- #PARAS / #MountAbu 🟢

#AstronomerLife #Astronomy #exoplanet

Some update of the upcoming campaign to observe the #transit of #HIP41378 f on Nov. 12 (thread here: https://astrodon.social/@AlexSanterne/109298827881210776).

Main observatory statuts:
- #Wendelstein obs. 🟠
- #SOPHIE / #HauteProvence 🟠
- #CARMENES / #CalarAlto 🟢
- #HARPS-N / #LaPalma 🟠
- #ESPRESSO / #ESO Paranal 🟢
- #EXPRES / #Lowell 🟢
- #NEID / #KittPeak 🟠
- #MINERVA / #FWLO 🟢
- #HIRES / #MaunaKea 🟢
- #MAROON-X / #MaunaKea 🔴
- #PARAS / #MountAbu 🟢
Details ⤵️

#astrophysics #AstronomerLife #Astronomy #exoplanet