#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

Dossier der Woche: Sonderfall Erde - welche Faktoren machen einen Planeten lebensfreundlich? #habitableZone #Planeten #Exoplanet #lebensfreundlich #Astronomie
https://www.scinexx.de/dossier/sonderfall-erde/

#ESO:
"
Erstes Licht für PoET: Ein strahlender Auftakt für die Exoplanetenforschung
"
".. 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

This is the spectroscopic transit of a #planet with an orbital period of 1.5 YEARS !! #HIP41378 🪐

In case you missed the great paper led by @sgrouffal (#ProudAdvisor), arXived over the summer, here is a recap'.

The planet HIP41378 f is a Saturn-sized transiting planet with an orbital period of 542 days. It means we can observe its transit only once every 1.5 years - it's actually once every 3 years from the ground as the host star is too close to the Sun (as seen from the Earth) every other transits.

With such a long orbital period and a nearly circular orbit, the transit event lasts 19 hours (!). Hence, from the ground, any observer could only observe a tiny fraction of the transit. To overcome this issue, back in 2022, we set up a worldwide collaboration of almost all high-resolution radial-velocity spectrographs across the globe. Over the same night, all the instruments observed the target HIP41378 at the time of planet'f transit, allowing us to detect the Rossiter-McLaughlin (RM) effect.

The RM effect is measuring the planet's orbital obliquity, i.e. the angle between the orbital plane and the spin axis of the star. While this angle is ~0º in the solar system, for HIP41378 it reaches Ψ=~52º.

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#Science #Space #Exoplanet #Astrophysics #Astronomy #telescope

[Atmosphère, atmosphère ... ] 33 000 km/h, soit 9 km/sec ! Telle est la vitesse des #vents du courant-jet qui enserre l'équateur de l'#exoplanète WASP-127b, une géante gazeuse distante de quelque 520 années lumière de la Terre. Des molécules de vapeur d'eau et de monoxyde de carbone ont par ailleurs été détectées au sein de cette #atmosphère planétaire.

Les conditions météorologiques extrêmes régnant à la surface de WASP-127b ont été déduites de mesures effectuées au moyen de l’instrument CRIRES+ installé sur le Very Large Telescope (VLT) de l’ @esoastronomy (ESO).

Infos+ : https://www.irap.omp.eu/2025/01/des-vents-supersoniques-extremes-mesures-sur-une-planete-hors-du-systeme-solaire/

#astronomy #astrophysics #exoplanet

Höllisch heiß und bunt schillernd: Astronomen könnten erstmals eine Glorie auf einem extrasolaren Planeten entdeckt haben – ein Leuchtphänomen aus konzentrischen Farbringen. #Exoplanet #Astronomie #Glorie #WASP76b
https://www.scinexx.de/news/kosmos/erste-glorie-auf-einem-exoplaneten-entdeckt/

#Exoplanet mit #Ozeanen und #Zeichen von #Leben entdeckt.
Im Falle von #K2-18 b haben die Forscher eine starke #Präsenz von #Dymethylsufid (DMS) ausgemacht, einem molekularem #Baustein, der in vielen #Planktonarten auf der #Erde vorkomme.

https://www.msn.com/de-de/nachrichten/wissenundtechnik/exoplanet-mit-ozeanen-und-zeichen-von-leben-entdeckt/ar-AA1gBwQt

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