Institut d'astrophysique de Paris
@iap.fr
Compte officiel de l'Institut d'astrophysique de Paris (IAP), une unité mixte de recherche du CNRS et de Sorbonne Université. #HelloESR
http://www.iap.fr/
http://www.iap.fr/
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La #ScienceCQFD c'est fini pour aujourd'hui mais on se retrouve lundi pour parler des grandes structures de l'univers ! 🌌
Ce sera, comme toujours, à 16h sur @franceculture.fr ! #ScienceCQFD
Ce sera, comme toujours, à 16h sur @franceculture.fr ! #ScienceCQFD
January 22, 2026 at 3:59 PM
La #ScienceCQFD c'est fini pour aujourd'hui mais on se retrouve lundi pour parler des grandes structures de l'univers ! 🌌
Ce sera, comme toujours, à 16h sur @franceculture.fr ! #ScienceCQFD
Ce sera, comme toujours, à 16h sur @franceculture.fr ! #ScienceCQFD
Reposted by Institut d'astrophysique de Paris
🆕 This NASA/ESA/CSA James Webb Space Telescope image shows the galaxy cluster MACS J1149, which is located about 5 billion light-years away from us. 🧪🔭
🔗 esa.int/ESA_Multimedia/Images/2026/01/A_celebrity_cluster_in_the_spotlight
@science.esa.int @stsci.edu
🔗 esa.int/ESA_Multimedia/Images/2026/01/A_celebrity_cluster_in_the_spotlight
@science.esa.int @stsci.edu
January 22, 2026 at 10:51 AM
🆕 This NASA/ESA/CSA James Webb Space Telescope image shows the galaxy cluster MACS J1149, which is located about 5 billion light-years away from us. 🧪🔭
🔗 esa.int/ESA_Multimedia/Images/2026/01/A_celebrity_cluster_in_the_spotlight
@science.esa.int @stsci.edu
🔗 esa.int/ESA_Multimedia/Images/2026/01/A_celebrity_cluster_in_the_spotlight
@science.esa.int @stsci.edu
Reposted by Institut d'astrophysique de Paris
We’re sad to report the passing of former ESA Director of Science Prof. Roger-Maurice Bonnet on 19 January 2026, aged 88.
🔗 esa.int/About_Us/Cor...
@cmundell.esa.int @science.esa.int @josefaschbacher.esa.int
🔗 esa.int/About_Us/Cor...
@cmundell.esa.int @science.esa.int @josefaschbacher.esa.int
January 20, 2026 at 9:27 PM
We’re sad to report the passing of former ESA Director of Science Prof. Roger-Maurice Bonnet on 19 January 2026, aged 88.
🔗 esa.int/About_Us/Cor...
@cmundell.esa.int @science.esa.int @josefaschbacher.esa.int
🔗 esa.int/About_Us/Cor...
@cmundell.esa.int @science.esa.int @josefaschbacher.esa.int
Reposted by Institut d'astrophysique de Paris
Que se cache-t-il derrière les aurores boréales ?
Jean Lilensten, astronome et planétologue, décrypte les trois choses à savoir pour comprendre les aurores boréales.
Jean Lilensten, astronome et planétologue, décrypte les trois choses à savoir pour comprendre les aurores boréales.
Trois choses à savoir sur les aurores boréales
www.cnrs.fr
January 20, 2026 at 10:51 PM
Que se cache-t-il derrière les aurores boréales ?
Jean Lilensten, astronome et planétologue, décrypte les trois choses à savoir pour comprendre les aurores boréales.
Jean Lilensten, astronome et planétologue, décrypte les trois choses à savoir pour comprendre les aurores boréales.
Reposted by Institut d'astrophysique de Paris
🔔 L'appel à projets "Allocations / Manifestations" reste ouvert jusqu'au vendredi 6 février 2026 ! Besoin d’infos, écrivez au : [email protected] ! Documents & détails : dim-origines.fr/spip.php?art.... Déposez votre candidature pour profiter des dernières opportunités de financement !
January 21, 2026 at 9:59 AM
🔔 L'appel à projets "Allocations / Manifestations" reste ouvert jusqu'au vendredi 6 février 2026 ! Besoin d’infos, écrivez au : [email protected] ! Documents & détails : dim-origines.fr/spip.php?art.... Déposez votre candidature pour profiter des dernières opportunités de financement !
Reposted by Institut d'astrophysique de Paris
Not all rings are forged in fantasy, my precious!
For astronomers, they are found in space. This image shows debris discs captured by ALMA around stars. The two at the top-right told astronomers something very interesting. Find out what here: https://www.eso.org/public/images/potw2603a/
🔭 🧪
For astronomers, they are found in space. This image shows debris discs captured by ALMA around stars. The two at the top-right told astronomers something very interesting. Find out what here: https://www.eso.org/public/images/potw2603a/
🔭 🧪
January 20, 2026 at 8:01 AM
Not all rings are forged in fantasy, my precious!
For astronomers, they are found in space. This image shows debris discs captured by ALMA around stars. The two at the top-right told astronomers something very interesting. Find out what here: https://www.eso.org/public/images/potw2603a/
🔭 🧪
For astronomers, they are found in space. This image shows debris discs captured by ALMA around stars. The two at the top-right told astronomers something very interesting. Find out what here: https://www.eso.org/public/images/potw2603a/
🔭 🧪
Reposted by Institut d'astrophysique de Paris
🌌 New insights from the ALMA survey reveal the teenage years of planetary systems! These detailed images of debris discs capture the chaotic growth stages of planets, akin to adolescence. #PlanetaryScience #ALMA @thenrao.bsky.social 🔭
www.mpia.de/news/science...
www.mpia.de/news/science...
ALMA Reveals Teenage Years of New Worlds
ARKS survey by ALMA provides insights into the early chaotic phases of planet formation, bridging gaps in our understanding of planetary systems.
www.mpia.de
January 20, 2026 at 8:32 AM
🌌 New insights from the ALMA survey reveal the teenage years of planetary systems! These detailed images of debris discs capture the chaotic growth stages of planets, akin to adolescence. #PlanetaryScience #ALMA @thenrao.bsky.social 🔭
www.mpia.de/news/science...
www.mpia.de/news/science...
Reposted by Institut d'astrophysique de Paris
📸 This new NASA/ESA/CSA James Webb Space Telescope image reveals the intricacies of the Helix Nebula in stunning detail! 🧬
🔗 esa.int/ESA_Multimedia/Images/2026/01/Webb_reveals_Helix_Nebula_in_glistening_detail
@science.esa.int @stsci.edu
🔗 esa.int/ESA_Multimedia/Images/2026/01/Webb_reveals_Helix_Nebula_in_glistening_detail
@science.esa.int @stsci.edu
January 20, 2026 at 3:29 PM
📸 This new NASA/ESA/CSA James Webb Space Telescope image reveals the intricacies of the Helix Nebula in stunning detail! 🧬
🔗 esa.int/ESA_Multimedia/Images/2026/01/Webb_reveals_Helix_Nebula_in_glistening_detail
@science.esa.int @stsci.edu
🔗 esa.int/ESA_Multimedia/Images/2026/01/Webb_reveals_Helix_Nebula_in_glistening_detail
@science.esa.int @stsci.edu
Reposted by Institut d'astrophysique de Paris
#Aurora over Europe!
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Ströbele over our headquarters in Garching near Munich. 🔭 🧪
📹 S. Ströbele/ESO
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Ströbele over our headquarters in Garching near Munich. 🔭 🧪
📹 S. Ströbele/ESO
January 20, 2026 at 4:35 PM
#Aurora over Europe!
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Ströbele over our headquarters in Garching near Munich. 🔭 🧪
📹 S. Ströbele/ESO
We're currently experiencing a strong geomagnetic storm, which caused a stunning auroral display all over Europe last night. This time-lapse was captured by our colleague Stefan Ströbele over our headquarters in Garching near Munich. 🔭 🧪
📹 S. Ströbele/ESO
Reposted by Institut d'astrophysique de Paris
Prochaine conférence mensuelle de la #SAF / Société Astronomique de France aura lieu mercredi 11 février 2026 au CNAM. Guillaume Hebrard, astrophysicien @iap.fr et #OHP, présentera : « Extraordinaires planètes extrasolaires ». Les inscriptions sont ouvertes ! saf-astronomie.fr/conferences/
January 19, 2026 at 6:40 AM
Prochaine conférence mensuelle de la #SAF / Société Astronomique de France aura lieu mercredi 11 février 2026 au CNAM. Guillaume Hebrard, astrophysicien @iap.fr et #OHP, présentera : « Extraordinaires planètes extrasolaires ». Les inscriptions sont ouvertes ! saf-astronomie.fr/conferences/
Reposted by Institut d'astrophysique de Paris
Reposted by Institut d'astrophysique de Paris
Chinese telescope in Antarctica probes uncharted heavenly radiation
Terahertz instrument at Dome A, world’s driest spot, traces the faint glow of gases beyond other telescopes’ reach. 🧪🔭
www.science.org/content/arti...
Terahertz instrument at Dome A, world’s driest spot, traces the faint glow of gases beyond other telescopes’ reach. 🧪🔭
www.science.org/content/arti...
Chinese telescope in Antarctica probes uncharted heavenly radiation
Terahertz instrument at Dome A, world’s driest spot, traces the faint glow of gases beyond other telescopes’ reach
www.science.org
January 15, 2026 at 11:47 AM
Chinese telescope in Antarctica probes uncharted heavenly radiation
Terahertz instrument at Dome A, world’s driest spot, traces the faint glow of gases beyond other telescopes’ reach. 🧪🔭
www.science.org/content/arti...
Terahertz instrument at Dome A, world’s driest spot, traces the faint glow of gases beyond other telescopes’ reach. 🧪🔭
www.science.org/content/arti...
Reposted by Institut d'astrophysique de Paris
It's likely that the Sun formed in a similar star formation region like this one featured here.
On the left, Lupus 3 is a dark cloud where new stars are forming. On the right, stars that have already emerged from their dusty stellar nursery.
More: https://www.eso.org/public/news/eso1303/ 🔭
On the left, Lupus 3 is a dark cloud where new stars are forming. On the right, stars that have already emerged from their dusty stellar nursery.
More: https://www.eso.org/public/news/eso1303/ 🔭
January 15, 2026 at 1:02 PM
It's likely that the Sun formed in a similar star formation region like this one featured here.
On the left, Lupus 3 is a dark cloud where new stars are forming. On the right, stars that have already emerged from their dusty stellar nursery.
More: https://www.eso.org/public/news/eso1303/ 🔭
On the left, Lupus 3 is a dark cloud where new stars are forming. On the right, stars that have already emerged from their dusty stellar nursery.
More: https://www.eso.org/public/news/eso1303/ 🔭
Reposted by Institut d'astrophysique de Paris
📁 #Matièrenoire et #énergiesombre
Explorer l’#Univers invisible : anomalies gravitationnelles, lentilles, énergie sombre, mission Euclid et cosmologie contemporaine.
🎧 Dossier complet sur la chaîne @iap.fr #CanalU : https://www.canal-u.tv/chaines/infos/matiere-noire-et-energie-sombre
Explorer l’#Univers invisible : anomalies gravitationnelles, lentilles, énergie sombre, mission Euclid et cosmologie contemporaine.
🎧 Dossier complet sur la chaîne @iap.fr #CanalU : https://www.canal-u.tv/chaines/infos/matiere-noire-et-energie-sombre
January 15, 2026 at 11:05 AM
📁 #Matièrenoire et #énergiesombre
Explorer l’#Univers invisible : anomalies gravitationnelles, lentilles, énergie sombre, mission Euclid et cosmologie contemporaine.
🎧 Dossier complet sur la chaîne @iap.fr #CanalU : https://www.canal-u.tv/chaines/infos/matiere-noire-et-energie-sombre
Explorer l’#Univers invisible : anomalies gravitationnelles, lentilles, énergie sombre, mission Euclid et cosmologie contemporaine.
🎧 Dossier complet sur la chaîne @iap.fr #CanalU : https://www.canal-u.tv/chaines/infos/matiere-noire-et-energie-sombre
Kumiko Kotera, directrice d'@iap.fr a participé samedi à la belle émission de Christophe Galfard sur France Inter, une petite heure pour découvrir des questions complexes de manière conviviale : www.radiofrance.fr/franceinter/... @cnrs-insu.bsky.social @cnrs-paris.bsky.social @sorbonne-universite.fr
À la recherche des objets les plus extrêmes de l’univers : les neutrinos
Dans cette émission, il est question des neutrinos. Avec Titiou Lecoq, autrice, Kumiko Kotera, astrophysicienne spécialiste des rayons cosmiques et plus particulièrement des rayons cosmiques de haute ...
www.radiofrance.fr
January 13, 2026 at 2:44 PM
Kumiko Kotera, directrice d'@iap.fr a participé samedi à la belle émission de Christophe Galfard sur France Inter, une petite heure pour découvrir des questions complexes de manière conviviale : www.radiofrance.fr/franceinter/... @cnrs-insu.bsky.social @cnrs-paris.bsky.social @sorbonne-universite.fr
Reposted by Institut d'astrophysique de Paris
Agents, agents... les industriels de l'IA n'ont que ce mot à la bouche. Buzz ou vraie tendance de fond? Deux informaticiens décryptent pour nous ce que peuvent faire et ne pas faire les agents LLM. A lire aussi dans le dernier numéro de La Recherche en kiosque.
www.larecherche.fr/informatique...
www.larecherche.fr/informatique...
Quand les agents LLM passent à l'action
Popularisés par ChatGPT, les grands modèles de langage (LLM) ont ouvert une ère d'interactions naturelles entre humains et machines.
www.larecherche.fr
January 12, 2026 at 3:20 PM
Agents, agents... les industriels de l'IA n'ont que ce mot à la bouche. Buzz ou vraie tendance de fond? Deux informaticiens décryptent pour nous ce que peuvent faire et ne pas faire les agents LLM. A lire aussi dans le dernier numéro de La Recherche en kiosque.
www.larecherche.fr/informatique...
www.larecherche.fr/informatique...
Reposted by Institut d'astrophysique de Paris
Delighted and honoured to have received this year's Early Career Award in Astronomy from the Royal Astronomical Society
www.ox.ac.uk/news/2026-01...
www.ox.ac.uk/news/2026-01...
January 9, 2026 at 5:42 PM
Delighted and honoured to have received this year's Early Career Award in Astronomy from the Royal Astronomical Society
www.ox.ac.uk/news/2026-01...
www.ox.ac.uk/news/2026-01...
Reposted by Institut d'astrophysique de Paris
Astronomers surprised by mysterious shock wave around dead star 😲
No known mechanism can fully explain our VLT's observations of the type of shock wave — called a bow shock — that a white dwarf originates as it interacts with the interstellar gas.
https://www.eso.org/public/news/eso2601/
🔭 🧪
No known mechanism can fully explain our VLT's observations of the type of shock wave — called a bow shock — that a white dwarf originates as it interacts with the interstellar gas.
https://www.eso.org/public/news/eso2601/
🔭 🧪
January 12, 2026 at 10:02 AM
Astronomers surprised by mysterious shock wave around dead star 😲
No known mechanism can fully explain our VLT's observations of the type of shock wave — called a bow shock — that a white dwarf originates as it interacts with the interstellar gas.
https://www.eso.org/public/news/eso2601/
🔭 🧪
No known mechanism can fully explain our VLT's observations of the type of shock wave — called a bow shock — that a white dwarf originates as it interacts with the interstellar gas.
https://www.eso.org/public/news/eso2601/
🔭 🧪
Toutes nos félicitations à Marta Volonteri, directrice de recherche @iap.fr, médaille d'argent du @cnrs.fr en 2022, qui vient d'être élue membre de l'@academiesciences.bsky.social ! @cnrs-insu.bsky.social @cnrs-paris.bsky.social @sorbonne-universite.fr
www.cnrs.fr/fr/personne/...
www.cnrs.fr/fr/personne/...
January 9, 2026 at 11:03 AM
Toutes nos félicitations à Marta Volonteri, directrice de recherche @iap.fr, médaille d'argent du @cnrs.fr en 2022, qui vient d'être élue membre de l'@academiesciences.bsky.social ! @cnrs-insu.bsky.social @cnrs-paris.bsky.social @sorbonne-universite.fr
www.cnrs.fr/fr/personne/...
www.cnrs.fr/fr/personne/...
Reposted by Institut d'astrophysique de Paris
Using APEX, astronomers carried out the CAFFEINE survey, observing many stellar nurseries — including GAL316 👇
They wanted to find out whether denser clouds of gas and dust are more efficient at forming new stars
Here's what they discovered: https://www.eso.org/public/images/potw2601a/
🔭 🧪
They wanted to find out whether denser clouds of gas and dust are more efficient at forming new stars
Here's what they discovered: https://www.eso.org/public/images/potw2601a/
🔭 🧪
January 5, 2026 at 8:02 AM
Using APEX, astronomers carried out the CAFFEINE survey, observing many stellar nurseries — including GAL316 👇
They wanted to find out whether denser clouds of gas and dust are more efficient at forming new stars
Here's what they discovered: https://www.eso.org/public/images/potw2601a/
🔭 🧪
They wanted to find out whether denser clouds of gas and dust are more efficient at forming new stars
Here's what they discovered: https://www.eso.org/public/images/potw2601a/
🔭 🧪
Pour bien terminer l'année, ne manquez pas ce grand entretien avec notre collègue Guillaume Hébrard : www.cieletespace.fr/actualites/e...
Extraordinaires planètes extrasolaires, un grand entretien avec Guillaume Hébrard
Depuis la découverte en 1995 de la première planète en dehors du Système solaire, ce sont aujourd’hui des milliers de mondes qui ont été identifiés autour d’autres étoiles que la nôtre. Et leur extrao...
www.cieletespace.fr
December 30, 2025 at 3:55 PM
Pour bien terminer l'année, ne manquez pas ce grand entretien avec notre collègue Guillaume Hébrard : www.cieletespace.fr/actualites/e...
📣Conférence publique @iap.fr par François Hammer d'@obs-paris-psl.bsky.social, mardi 6 janvier 2026 à 19h30, en direct sur youtu.be/000zV2QQ1PU 📡programme sur www.iap.fr/science/conf... @cnrs-insu.bsky.social @cnrs-paris.bsky.social aris.bsky.social @sorbonne-universite.fr
December 30, 2025 at 11:04 AM
📣Conférence publique @iap.fr par François Hammer d'@obs-paris-psl.bsky.social, mardi 6 janvier 2026 à 19h30, en direct sur youtu.be/000zV2QQ1PU 📡programme sur www.iap.fr/science/conf... @cnrs-insu.bsky.social @cnrs-paris.bsky.social aris.bsky.social @sorbonne-universite.fr
Reposted by Institut d'astrophysique de Paris
🎄 Are your holiday decorations ready? Euclid has a cosmic garland to add: NGC 646.
The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland
🔭
The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland
🔭
December 22, 2025 at 1:10 PM
🎄 Are your holiday decorations ready? Euclid has a cosmic garland to add: NGC 646.
The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland
🔭
The large barred spiral galaxy appears close to a smaller galaxy to the left, but they’re actually about 45 million light-years apart 👉 https://www.esa.int/ESA_Multimedia/Images/2025/12/Euclid_s_galaxy_garland
🔭
Reposted by Institut d'astrophysique de Paris
On this darkest solstice day of the year, my heart has dimmed, waking up to learn of the loss of dear colleague and mentor, Yannick Mellier. Yannick will be known to most as the lead of the amazing Euclid Space Telescope which will revolutionise our understanding of the Dark Universe 🧵🔭
![This square astronomical image shows thousands of galaxies across the black expanse of space. The closest thousand or so galaxies belong to the Perseus Cluster. The most prominent members of the cluster are visible in the centre of the image and appear as large galaxies with haloes around them in yellow/white, comparable to streetlamps in a foggy night. The background of this image is scattered with a hundred thousand more distant galaxies of different shapes, ranging in colour from white to yellow to red. Most galaxies are so far away they appear as single points of light. The more distant a galaxy is, the redder it appears.]
CREDIT
ESA/Euclid/Euclid Consortium/NASA, image processing by J.-C. Cuillandre (CEA Paris-Saclay), G. Anselmi](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:ok3ms3dzop7gcwejp7lswhpi/bafkreiaukh5rfzzy4i242zdeoibuspehm6tmksbv3mfgk7yxcbk6fbtnv4@jpeg)
December 21, 2025 at 8:45 AM
On this darkest solstice day of the year, my heart has dimmed, waking up to learn of the loss of dear colleague and mentor, Yannick Mellier. Yannick will be known to most as the lead of the amazing Euclid Space Telescope which will revolutionise our understanding of the Dark Universe 🧵🔭
It is with great sadness that we announce the passing of our colleague Yannick Mellier. Yannick was an eminent astronomer, an international figure in modern cosmology, founder and director of TERAPIX from 1997 to 2011, and Consortium Lead of the Euclid space mission since 2011.
December 22, 2025 at 10:16 AM
It is with great sadness that we announce the passing of our colleague Yannick Mellier. Yannick was an eminent astronomer, an international figure in modern cosmology, founder and director of TERAPIX from 1997 to 2011, and Consortium Lead of the Euclid space mission since 2011.