Jean-François Gonzalez
@jfg-astro.bsky.social
Astrophysicist at CRAL (Observatoire de Lyon, Université Lyon 1, @ENSdeLyon.bsky.social) | Planet formation 🪐
🐘: @jfg_astro@fediscience.org
Born at 325ppm CO2
🐘: @jfg_astro@fediscience.org
Born at 325ppm CO2
Reposted by Jean-François Gonzalez
I helped Professor Dave lay out exactly how Avi Loeb has manufactured doubt and pushed a false narrative about 3I/ATLAS, which is still an interstellar comet. Please enjoy the video and please repost this to share the word.
www.youtube.com/watch?v=lf9o...
www.youtube.com/watch?v=lf9o...
Avi Loeb is a Fraud Part 2: 3I/ATLAS Shrugged
YouTube video by Professor Dave Explains
www.youtube.com
November 20, 2025 at 11:13 PM
I helped Professor Dave lay out exactly how Avi Loeb has manufactured doubt and pushed a false narrative about 3I/ATLAS, which is still an interstellar comet. Please enjoy the video and please repost this to share the word.
www.youtube.com/watch?v=lf9o...
www.youtube.com/watch?v=lf9o...
Reposted by Jean-François Gonzalez
PAPER ALERT!!!
OKAY, I’m SUPER EXCITED - our article that we started in 2022 has just been published!
👉 Title: A socio-demographic study of the exoplanet direct imaging community 2
👉 Link: baas.aas.org/pub/2025i028...
👉 Key results: 👇👇👇
OKAY, I’m SUPER EXCITED - our article that we started in 2022 has just been published!
👉 Title: A socio-demographic study of the exoplanet direct imaging community 2
👉 Link: baas.aas.org/pub/2025i028...
👉 Key results: 👇👇👇
A socio-demographic study of the exoplanet direct imaging community II
This article presents results from a 2022 Spirit of Lyot conference survey assessing diversity, visibility, and experiences of inappropriate behavior in the exoplanet imaging community. It reveals per...
baas.aas.org
November 19, 2025 at 1:11 PM
PAPER ALERT!!!
OKAY, I’m SUPER EXCITED - our article that we started in 2022 has just been published!
👉 Title: A socio-demographic study of the exoplanet direct imaging community 2
👉 Link: baas.aas.org/pub/2025i028...
👉 Key results: 👇👇👇
OKAY, I’m SUPER EXCITED - our article that we started in 2022 has just been published!
👉 Title: A socio-demographic study of the exoplanet direct imaging community 2
👉 Link: baas.aas.org/pub/2025i028...
👉 Key results: 👇👇👇
Reposted by Jean-François Gonzalez
ALERTE PAPIER !!!
AYÉ, je suis SUREXCITÉE, notre article démarré en 2022 vient d'être publié !
👉 Titre : A socio-demographic study of the exoplanet direct imaging community 2
👉 Lien : baas.aas.org/pub/2025i028...
👉 Résultats marquants :👇👇👇
AYÉ, je suis SUREXCITÉE, notre article démarré en 2022 vient d'être publié !
👉 Titre : A socio-demographic study of the exoplanet direct imaging community 2
👉 Lien : baas.aas.org/pub/2025i028...
👉 Résultats marquants :👇👇👇
A socio-demographic study of the exoplanet direct imaging community II
This article presents results from a 2022 Spirit of Lyot conference survey assessing diversity, visibility, and experiences of inappropriate behavior in the exoplanet imaging community. It reveals per...
baas.aas.org
November 19, 2025 at 12:34 PM
ALERTE PAPIER !!!
AYÉ, je suis SUREXCITÉE, notre article démarré en 2022 vient d'être publié !
👉 Titre : A socio-demographic study of the exoplanet direct imaging community 2
👉 Lien : baas.aas.org/pub/2025i028...
👉 Résultats marquants :👇👇👇
AYÉ, je suis SUREXCITÉE, notre article démarré en 2022 vient d'être publié !
👉 Titre : A socio-demographic study of the exoplanet direct imaging community 2
👉 Lien : baas.aas.org/pub/2025i028...
👉 Résultats marquants :👇👇👇
Reposted by Jean-François Gonzalez
Congratulations! Your students know more about comets than Avi Loeb!
This! Here's a slide pulled from my class lecture notes this semester. Comets have two clear tails - one from dust and one from ions. They point in different directions because one feels the solar wind while the other feels radiation pressure.
November 14, 2025 at 4:36 PM
Congratulations! Your students know more about comets than Avi Loeb!
Reposted by Jean-François Gonzalez
Avi Loeb's calculations about 3I/ATLAS are 100% wrong because he has never understood that dust in the tail(s) responds to solar radiation pressure. Solar wind shapes the ion tail. But the radiation pressure is about 1000 times larger than the solar wind ram pressure, for particles that feel it.
November 13, 2025 at 9:36 PM
Avi Loeb's calculations about 3I/ATLAS are 100% wrong because he has never understood that dust in the tail(s) responds to solar radiation pressure. Solar wind shapes the ion tail. But the radiation pressure is about 1000 times larger than the solar wind ram pressure, for particles that feel it.
Reposted by Jean-François Gonzalez
Yes!! Jason Wright, Sean Raymond and I also pointed out 'Oumuamua was stupidly thick, inefficiently reflected mostly red light, and was tumbling and non-functioning. Are aliens terrible engineers? Excellent engineers who make spaceships that LOOK like comets/chunks of ice? I can't disprove that.🤷
Speaking as a spacecraft engineer, the thing that gets me about Loeb's interpretations is that his alien engineers are insultingly incompetent.
RCS thruster plumes visible from the other side of the solar system, making no difference in the trajectory?!
And 'Oumuamua was a *terrible* solar sail.
RCS thruster plumes visible from the other side of the solar system, making no difference in the trajectory?!
And 'Oumuamua was a *terrible* solar sail.
November 8, 2025 at 7:58 PM
Yes!! Jason Wright, Sean Raymond and I also pointed out 'Oumuamua was stupidly thick, inefficiently reflected mostly red light, and was tumbling and non-functioning. Are aliens terrible engineers? Excellent engineers who make spaceships that LOOK like comets/chunks of ice? I can't disprove that.🤷
Reposted by Jean-François Gonzalez
New image of interstellar comet 3I/ATLAS by M. Jäger, G. Rhemann & E. Prosperi.
Avi Loeb's: "Is the network of jets associated with pockets of ice on the surface of a natural cometary nucleus or are they coming from a set of jet thrusters used for navigation of a spacecraft? We do not know."
Avi Loeb's: "Is the network of jets associated with pockets of ice on the surface of a natural cometary nucleus or are they coming from a set of jet thrusters used for navigation of a spacecraft? We do not know."
November 8, 2025 at 6:35 PM
New image of interstellar comet 3I/ATLAS by M. Jäger, G. Rhemann & E. Prosperi.
Avi Loeb's: "Is the network of jets associated with pockets of ice on the surface of a natural cometary nucleus or are they coming from a set of jet thrusters used for navigation of a spacecraft? We do not know."
Avi Loeb's: "Is the network of jets associated with pockets of ice on the surface of a natural cometary nucleus or are they coming from a set of jet thrusters used for navigation of a spacecraft? We do not know."
Reposted by Jean-François Gonzalez
Rosalind Franklin, la véritable pionnière de ces travaux sur la découverte de la structure en double hélice de l'ADN, est morte en 1958 sans avoir jamais été reconnue comme la scientifique à l'origine des résultats qui ont valu le Nobel à Watson.
💪
💪
⚫ Le prix Nobel américain James Watson, qui révolutionné la science en découvrant la structure de l'ADN avec son collègue Francis Crick, est décédé à l'âge de 97 ans, a annoncé vendredi le Cold Spring Harbor Laboratory (CSHL), avec lequel il a travaillé ⬇️
November 8, 2025 at 8:33 AM
Rosalind Franklin, la véritable pionnière de ces travaux sur la découverte de la structure en double hélice de l'ADN, est morte en 1958 sans avoir jamais été reconnue comme la scientifique à l'origine des résultats qui ont valu le Nobel à Watson.
💪
💪
Reposted by Jean-François Gonzalez
Correction : "L'homme qui a volé la découverte de l'ADN à Rosalind Franklin est mort. Il était en outre raciste et homophobe, et prônait la sélection génétique pour appuyer ces idéologies."
Bon débarras.
Bon débarras.
James Watson, codécouvreur de la structure en double hélice de l’ADN, est mort à l’âge de 97 ans
James Watson, codécouvreur de la structure en double hélice de l’ADN, est mort à l’âge de 97 ans
Colauréat du Nobel 1962 pour une découverte qui a donné le coup d’envoi de la révolution génétique, l’Américain avait terni son image en minimisant le travail de la cristallographe Rosalind Franklin et par ses sorties racistes, sexistes et eugénistes. Le généticien et biochimiste américain est mort jeudi à East Northport, dans l’Etat de New York.
www.lemonde.fr
November 8, 2025 at 6:50 AM
Correction : "L'homme qui a volé la découverte de l'ADN à Rosalind Franklin est mort. Il était en outre raciste et homophobe, et prônait la sélection génétique pour appuyer ces idéologies."
Bon débarras.
Bon débarras.
Reposted by Jean-François Gonzalez
👉 OFFRE DE STAGE 👈
J'ouvre un stage orienté SHS pour de l'analyse de données de sondages socio-démographiques !
Les thèmes : l'Inclusion, Diversité & Equité de groupes sous-représentés en astronomie.
N'hésitez pas à m'envoyer un email si ce sujet vous intéresse, ou à le diffuser autour de vous !
J'ouvre un stage orienté SHS pour de l'analyse de données de sondages socio-démographiques !
Les thèmes : l'Inclusion, Diversité & Equité de groupes sous-représentés en astronomie.
N'hésitez pas à m'envoyer un email si ce sujet vous intéresse, ou à le diffuser autour de vous !
October 29, 2025 at 9:35 AM
👉 OFFRE DE STAGE 👈
J'ouvre un stage orienté SHS pour de l'analyse de données de sondages socio-démographiques !
Les thèmes : l'Inclusion, Diversité & Equité de groupes sous-représentés en astronomie.
N'hésitez pas à m'envoyer un email si ce sujet vous intéresse, ou à le diffuser autour de vous !
J'ouvre un stage orienté SHS pour de l'analyse de données de sondages socio-démographiques !
Les thèmes : l'Inclusion, Diversité & Equité de groupes sous-représentés en astronomie.
N'hésitez pas à m'envoyer un email si ce sujet vous intéresse, ou à le diffuser autour de vous !
Reposted by Jean-François Gonzalez
🚨 ALERTE ARTICLE �
"Women participation in French Astronomy 2025", Lagarde et al. 2025, résumé et quelques plots...
👉 La Commission Femmes & Astro de la @sf2a.bsky.social a mené une étude statistique sur la présence des femmes dans l’astronomie professionnelle française 👇👇👇
"Women participation in French Astronomy 2025", Lagarde et al. 2025, résumé et quelques plots...
👉 La Commission Femmes & Astro de la @sf2a.bsky.social a mené une étude statistique sur la présence des femmes dans l’astronomie professionnelle française 👇👇👇
a blue and red background with a globe in the background
ALT: a blue and red background with a globe in the background
media.tenor.com
October 22, 2025 at 8:23 AM
🚨 ALERTE ARTICLE �
"Women participation in French Astronomy 2025", Lagarde et al. 2025, résumé et quelques plots...
👉 La Commission Femmes & Astro de la @sf2a.bsky.social a mené une étude statistique sur la présence des femmes dans l’astronomie professionnelle française 👇👇👇
"Women participation in French Astronomy 2025", Lagarde et al. 2025, résumé et quelques plots...
👉 La Commission Femmes & Astro de la @sf2a.bsky.social a mené une étude statistique sur la présence des femmes dans l’astronomie professionnelle française 👇👇👇
Reposted by Jean-François Gonzalez
2/ If you want to learn more about 4MOST, head over to the ESO Blog to learn about:
👉 the technical challenges of observing thousands of objects simultaneously
👉 the scientific questions @4most-eu.bsky.social will address
www.eso.org/public/blog/...
🔭 🧪
#instrumentation
👉 the technical challenges of observing thousands of objects simultaneously
👉 the scientific questions @4most-eu.bsky.social will address
www.eso.org/public/blog/...
🔭 🧪
#instrumentation
ESOblog: The magic behind 4MOST Thousands of eyes to chart the sky
The magic behind 4MOST
www.eso.org
October 21, 2025 at 1:28 PM
2/ If you want to learn more about 4MOST, head over to the ESO Blog to learn about:
👉 the technical challenges of observing thousands of objects simultaneously
👉 the scientific questions @4most-eu.bsky.social will address
www.eso.org/public/blog/...
🔭 🧪
#instrumentation
👉 the technical challenges of observing thousands of objects simultaneously
👉 the scientific questions @4most-eu.bsky.social will address
www.eso.org/public/blog/...
🔭 🧪
#instrumentation
Reposted by Jean-François Gonzalez
First Light for 4MOST - what an experience! Paranal Observatory is already a magic place on its own right - but getting a new facility on sky ... that's hard to top! www.aip.de/en/news/4mos...
4MOST Captures First Light
On October 18, 2025, the 4-metre Multi-Object Spectroscopic Telescope (4MOST) facility, installed on the VISTA telescope at the European Southern Observatory’s (ESO) Paranal Observatory in Chile, obta
www.aip.de
October 21, 2025 at 12:24 PM
First Light for 4MOST - what an experience! Paranal Observatory is already a magic place on its own right - but getting a new facility on sky ... that's hard to top! www.aip.de/en/news/4mos...
Reposted by Jean-François Gonzalez
Very cool work from Monsch et al. on the arxiv today, on a recently-discovered protoplanetary disk seen very nearly edge-on. It has weird, wispy structures and asymmetries - far more dynamic than we normally imagine disks to be! And, of course, it makes for beautiful images.
arxiv.org/abs/2510.11819
arxiv.org/abs/2510.11819
October 15, 2025 at 11:47 AM
Very cool work from Monsch et al. on the arxiv today, on a recently-discovered protoplanetary disk seen very nearly edge-on. It has weird, wispy structures and asymmetries - far more dynamic than we normally imagine disks to be! And, of course, it makes for beautiful images.
arxiv.org/abs/2510.11819
arxiv.org/abs/2510.11819
Reposted by Jean-François Gonzalez
Yep, phone numbers and people’s b’days.
I always highlight these examples as us “outsourcing” the part of our brain that remembered this to tech/social media and now we don’t use that part of our brain as much.
So imagine what your losing when outsourcing the thinking part of your brain to ChatGPT
I always highlight these examples as us “outsourcing” the part of our brain that remembered this to tech/social media and now we don’t use that part of our brain as much.
So imagine what your losing when outsourcing the thinking part of your brain to ChatGPT
If anyone needs me I will be in the museum, lying down next to the bog bodies.
October 13, 2025 at 8:07 PM
Yep, phone numbers and people’s b’days.
I always highlight these examples as us “outsourcing” the part of our brain that remembered this to tech/social media and now we don’t use that part of our brain as much.
So imagine what your losing when outsourcing the thinking part of your brain to ChatGPT
I always highlight these examples as us “outsourcing” the part of our brain that remembered this to tech/social media and now we don’t use that part of our brain as much.
So imagine what your losing when outsourcing the thinking part of your brain to ChatGPT
Reposted by Jean-François Gonzalez
Your yearly reminder that university rankings are less than useless
October 10, 2025 at 7:29 AM
Your yearly reminder that university rankings are less than useless
Reposted by Jean-François Gonzalez
Personal milestone ✅
So proud to share this article / research, which has been accepted for publication in @pasajournal.bsky.social
This is several years of my PhD work so far, so here's a little thread about it.
The BIG question: Are millisecond #pulsar profiles stable?
Strap in!
1/n
🔭🧪📡
So proud to share this article / research, which has been accepted for publication in @pasajournal.bsky.social
This is several years of my PhD work so far, so here's a little thread about it.
The BIG question: Are millisecond #pulsar profiles stable?
Strap in!
1/n
🔭🧪📡
"Millisecond pulsars, whilst remarkably stable, may not be the perfect timekeepers we once thought they were"
New research by @cosmicrami.com outlines how a pulsar throwing a tantrum could impact precision timing experiments.
www.spaceaustralia.com/feature/puls...
#SpaceAustralia
📸 NASA SVS
🔭🧪
New research by @cosmicrami.com outlines how a pulsar throwing a tantrum could impact precision timing experiments.
www.spaceaustralia.com/feature/puls...
#SpaceAustralia
📸 NASA SVS
🔭🧪
September 30, 2025 at 11:03 PM
Personal milestone ✅
So proud to share this article / research, which has been accepted for publication in @pasajournal.bsky.social
This is several years of my PhD work so far, so here's a little thread about it.
The BIG question: Are millisecond #pulsar profiles stable?
Strap in!
1/n
🔭🧪📡
So proud to share this article / research, which has been accepted for publication in @pasajournal.bsky.social
This is several years of my PhD work so far, so here's a little thread about it.
The BIG question: Are millisecond #pulsar profiles stable?
Strap in!
1/n
🔭🧪📡
Reposted by Jean-François Gonzalez
New paper, led by @physicsuol.bsky.social PhD student @simintong.bsky.social. Simin looked at the rings we see in planet-forming discs, and combined new models with multi-wavelength ALMA observations to understand the underlying physical properties of the dust and gas. 🔭
arxiv.org/abs/2509.24818
arxiv.org/abs/2509.24818
September 30, 2025 at 6:48 AM
New paper, led by @physicsuol.bsky.social PhD student @simintong.bsky.social. Simin looked at the rings we see in planet-forming discs, and combined new models with multi-wavelength ALMA observations to understand the underlying physical properties of the dust and gas. 🔭
arxiv.org/abs/2509.24818
arxiv.org/abs/2509.24818
Reposted by Jean-François Gonzalez
Only a con artist would say this was a con. Source BBC
September 25, 2025 at 9:37 AM
Only a con artist would say this was a con. Source BBC
Reposted by Jean-François Gonzalez
Discours lunaire à l'ONU de M. Trump. Les scientifiques travaillant sur le climat sont des "idiots". "Le changement climatique est la plus grande arnaque jamais menée contre le monde".
[1/2]
[1/2]
September 23, 2025 at 6:18 PM
Discours lunaire à l'ONU de M. Trump. Les scientifiques travaillant sur le climat sont des "idiots". "Le changement climatique est la plus grande arnaque jamais menée contre le monde".
[1/2]
[1/2]
Reposted by Jean-François Gonzalez
We have job opportunities in the APEx department at MPIA - please spread the word!
Postdocs: aas.org/jobregister/...
Tenure-track staff: aas.org/jobregister/...
Max Planck Research Group Leaders: aas.org/jobregister/...
+ happy to host ERC, Humboldt, and other third-party funds.
Postdocs: aas.org/jobregister/...
Tenure-track staff: aas.org/jobregister/...
Max Planck Research Group Leaders: aas.org/jobregister/...
+ happy to host ERC, Humboldt, and other third-party funds.
September 15, 2025 at 9:32 AM
We have job opportunities in the APEx department at MPIA - please spread the word!
Postdocs: aas.org/jobregister/...
Tenure-track staff: aas.org/jobregister/...
Max Planck Research Group Leaders: aas.org/jobregister/...
+ happy to host ERC, Humboldt, and other third-party funds.
Postdocs: aas.org/jobregister/...
Tenure-track staff: aas.org/jobregister/...
Max Planck Research Group Leaders: aas.org/jobregister/...
+ happy to host ERC, Humboldt, and other third-party funds.
Reposted by Jean-François Gonzalez
Project Hail Mary, based on one of the best sci-fi books I’ve read recently, is about to hit the screen. The story? A teacher-turned-astronaut who meets an alien named Rocky. I can’t wait! www.youtube.com/watch?v=vkcE...
PROJECT HAIL MARY Trailer (2025) Ryan Gosling
YouTube video by ONE Media
www.youtube.com
September 14, 2025 at 4:53 AM
Project Hail Mary, based on one of the best sci-fi books I’ve read recently, is about to hit the screen. The story? A teacher-turned-astronaut who meets an alien named Rocky. I can’t wait! www.youtube.com/watch?v=vkcE...
Reposted by Jean-François Gonzalez
72 savantes sur la tour Eiffel !
Le projet porté par Isabelle Vauglin au nom de l'association femmes & sciences a abouti à la recommandation par la maire de Paris d'inscrire le nom de 72 savantes ayant vécu de 1789 à nos jours sur la tour Eiffel, en surplomb des 72 savants de la frise actuelle.
Le projet porté par Isabelle Vauglin au nom de l'association femmes & sciences a abouti à la recommandation par la maire de Paris d'inscrire le nom de 72 savantes ayant vécu de 1789 à nos jours sur la tour Eiffel, en surplomb des 72 savants de la frise actuelle.
September 12, 2025 at 2:30 PM
72 savantes sur la tour Eiffel !
Le projet porté par Isabelle Vauglin au nom de l'association femmes & sciences a abouti à la recommandation par la maire de Paris d'inscrire le nom de 72 savantes ayant vécu de 1789 à nos jours sur la tour Eiffel, en surplomb des 72 savants de la frise actuelle.
Le projet porté par Isabelle Vauglin au nom de l'association femmes & sciences a abouti à la recommandation par la maire de Paris d'inscrire le nom de 72 savantes ayant vécu de 1789 à nos jours sur la tour Eiffel, en surplomb des 72 savants de la frise actuelle.
Reposted by Jean-François Gonzalez
OYEZ OYEZ, GRENOBLOISES, GRENOBLOIS ET METROPOLE, un évènement ce weekend dans nos contrées !!!
@osug-fr.bsky.social
@osug-fr.bsky.social
September 12, 2025 at 7:36 AM
OYEZ OYEZ, GRENOBLOISES, GRENOBLOIS ET METROPOLE, un évènement ce weekend dans nos contrées !!!
@osug-fr.bsky.social
@osug-fr.bsky.social