Aeronomix (Guillaume G)
@aeronomix.bsky.social
Astrophysicist, lidar scientist
Comets are like 🐈: they have tails and they do what they want!
Comets are like 🐈: they have tails and they do what they want!
Reposted by Aeronomix (Guillaume G)
Interstellar Comet 3I/ATLAS is fragmenting on its way back out from the Sun. 🧪🔭
www.virtualtelescope.eu/2025/11/13/c...
www.virtualtelescope.eu/2025/11/13/c...
November 13, 2025 at 9:21 PM
Interstellar Comet 3I/ATLAS is fragmenting on its way back out from the Sun. 🧪🔭
www.virtualtelescope.eu/2025/11/13/c...
www.virtualtelescope.eu/2025/11/13/c...
Reposted by Aeronomix (Guillaume G)
Check out this crazy mosaic image of the auroral oval from space on the night of Nov 11-12!
You an can see just how extended the oval was due to the impressive solar storm that impacted and delivered a G4 (Kp 9-) geomagnetic storm - the third strongest of solar cycle 25!
You an can see just how extended the oval was due to the impressive solar storm that impacted and delivered a G4 (Kp 9-) geomagnetic storm - the third strongest of solar cycle 25!
November 13, 2025 at 4:56 PM
Check out this crazy mosaic image of the auroral oval from space on the night of Nov 11-12!
You an can see just how extended the oval was due to the impressive solar storm that impacted and delivered a G4 (Kp 9-) geomagnetic storm - the third strongest of solar cycle 25!
You an can see just how extended the oval was due to the impressive solar storm that impacted and delivered a G4 (Kp 9-) geomagnetic storm - the third strongest of solar cycle 25!
Hampton, va, right now
November 12, 2025 at 2:27 AM
Hampton, va, right now
Reposted by Aeronomix (Guillaume G)
So tonight has potential for great aurora viewing in most of the US.
Some sites I like to keep an eye on.
NOAA Aurora Dashboard (Experimental) | NOAA / NWS SWPC Center share.google/tKRzSAcBOQUw...
Spaceweather.com
Kyoto realtime dst (more negative bigger storm) share.google/382bGp5WGtwt...
Some sites I like to keep an eye on.
NOAA Aurora Dashboard (Experimental) | NOAA / NWS SWPC Center share.google/tKRzSAcBOQUw...
Spaceweather.com
Kyoto realtime dst (more negative bigger storm) share.google/382bGp5WGtwt...
Aurora Dashboard (Experimental) | NOAA / NWS Space Weather Prediction Center
share.google
November 12, 2025 at 12:30 AM
So tonight has potential for great aurora viewing in most of the US.
Some sites I like to keep an eye on.
NOAA Aurora Dashboard (Experimental) | NOAA / NWS SWPC Center share.google/tKRzSAcBOQUw...
Spaceweather.com
Kyoto realtime dst (more negative bigger storm) share.google/382bGp5WGtwt...
Some sites I like to keep an eye on.
NOAA Aurora Dashboard (Experimental) | NOAA / NWS SWPC Center share.google/tKRzSAcBOQUw...
Spaceweather.com
Kyoto realtime dst (more negative bigger storm) share.google/382bGp5WGtwt...
Reposted by Aeronomix (Guillaume G)
With this latest X5 CME, I would not be surprised to see an upgrade to a G4 SEVERE geomagnetic storm watch from NOAA SWPC for Nov 12 and an extension of the overall watch into Nov 13. We will see...
November 11, 2025 at 1:34 PM
With this latest X5 CME, I would not be surprised to see an upgrade to a G4 SEVERE geomagnetic storm watch from NOAA SWPC for Nov 12 and an extension of the overall watch into Nov 13. We will see...
Reposted by Aeronomix (Guillaume G)
The Sun just produced an X5.1 class #SolarFlare. This is the largest flare of 2025 so far, and 6th largest of the past two years. It triggered a strong ‘Radio Blackout’ and moderate ‘Solar Radiation Storm’ at Earth, and released what is most likely an Earth-directed coronal mass ejection!
November 11, 2025 at 2:56 PM
The Sun just produced an X5.1 class #SolarFlare. This is the largest flare of 2025 so far, and 6th largest of the past two years. It triggered a strong ‘Radio Blackout’ and moderate ‘Solar Radiation Storm’ at Earth, and released what is most likely an Earth-directed coronal mass ejection!
We are doubling the irradiation dose at airplane altitude over the poles... I wish that happened last August when I was doing measurements over there (it is still low doses, nothing to worry about at these altitudes)
November 11, 2025 at 3:23 PM
We are doubling the irradiation dose at airplane altitude over the poles... I wish that happened last August when I was doing measurements over there (it is still low doses, nothing to worry about at these altitudes)
This could be interesting!
(I wish I lived a little north from my place)
(I wish I lived a little north from my place)
This CME is really stunning. In CCOR-1, you can see the blast surrounding the occulting disk in the center in what we call a "full halo." When this happens, if the source region is on the Earth-facing disk, we know the CME is coming at Earth.
#heliophysics
#heliophysics
November 11, 2025 at 2:52 PM
This could be interesting!
(I wish I lived a little north from my place)
(I wish I lived a little north from my place)
Reposted by Aeronomix (Guillaume G)
Here is the X5.1 flare in straight EUV light. We are looking at the 193 Å "gold" filter here. The flare is the bright flash, and immediately, you can see a giant blast wave racing through the Sun's corona, lifting tons of plasma into space as an Earth-directed CME.
November 11, 2025 at 2:08 PM
Here is the X5.1 flare in straight EUV light. We are looking at the 193 Å "gold" filter here. The flare is the bright flash, and immediately, you can see a giant blast wave racing through the Sun's corona, lifting tons of plasma into space as an Earth-directed CME.
We just got a large X5.1 flare and we have a S2 radiation storm (nothing to worry about, but very interesting to study)
November 11, 2025 at 1:17 PM
We just got a large X5.1 flare and we have a S2 radiation storm (nothing to worry about, but very interesting to study)
Reposted by Aeronomix (Guillaume G)
j'en ai toujours 2 ou 3 dans ma réserve, avec le petit panier à cornichon
November 8, 2025 at 11:37 PM
j'en ai toujours 2 ou 3 dans ma réserve, avec le petit panier à cornichon
Reposted by Aeronomix (Guillaume G)
You are a Post-Padawan now!
November 5, 2025 at 3:24 PM
You are a Post-Padawan now!
Reposted by Aeronomix (Guillaume G)
Here is the AIA 211 Å base-difference movie of the EUV wave from the X1.8 CME. It is a nice eruption, but I think a lot of the CME is heading east. We'll have to see what coronagraphs and models have to say about this. More activity could happen today and throughout the week.
November 4, 2025 at 6:48 PM
Here is the AIA 211 Å base-difference movie of the EUV wave from the X1.8 CME. It is a nice eruption, but I think a lot of the CME is heading east. We'll have to see what coronagraphs and models have to say about this. More activity could happen today and throughout the week.
Reposted by Aeronomix (Guillaume G)
🔭 Pour la première fois, les gigantesques portes de l'ELT ont bougé 🤩 Ce télescope de 39m de diamètre est protégé par un dôme de 74m de haut et des portes de 650t 🤯
youtu.be/FuMvka1-dA4?...
youtu.be/FuMvka1-dA4?...
The Extremely Large Telescope doors move for the first time
YouTube video by European Southern Observatory (ESO)
youtu.be
November 3, 2025 at 1:20 PM
🔭 Pour la première fois, les gigantesques portes de l'ELT ont bougé 🤩 Ce télescope de 39m de diamètre est protégé par un dôme de 74m de haut et des portes de 650t 🤯
youtu.be/FuMvka1-dA4?...
youtu.be/FuMvka1-dA4?...
😪
He had a nice role in the movie "the core, fusion"
(I make commentaries longer than the movie itself to show how its science is wrong... but it is aeronomy/geophysics)
He had a nice role in the movie "the core, fusion"
(I make commentaries longer than the movie itself to show how its science is wrong... but it is aeronomy/geophysics)
Just learned Tchéky Karyo is dead.
Damn, that sucks, he was one of those great french actor with an unforgetable face and overwhelming presence.
Damn, that sucks, he was one of those great french actor with an unforgetable face and overwhelming presence.
November 1, 2025 at 2:42 PM
😪
He had a nice role in the movie "the core, fusion"
(I make commentaries longer than the movie itself to show how its science is wrong... but it is aeronomy/geophysics)
He had a nice role in the movie "the core, fusion"
(I make commentaries longer than the movie itself to show how its science is wrong... but it is aeronomy/geophysics)
Some cool comet stuff!
(We managed to put the arxiv paper this morning... this was fast)
www.livescience.com/space/comets...
(We managed to put the arxiv paper this morning... this was fast)
www.livescience.com/space/comets...
Comet 3I/ATLAS has been transformed by billions of years of space radiation, James Webb Space Telescope observations reveal
The interstellar comet 3I/ATLAS has a thick irradiated crust that no longer resembles its home star system, simulations and James Webb Space Telescope observations have found.
www.livescience.com
November 1, 2025 at 1:40 AM
Some cool comet stuff!
(We managed to put the arxiv paper this morning... this was fast)
www.livescience.com/space/comets...
(We managed to put the arxiv paper this morning... this was fast)
www.livescience.com/space/comets...
Reposted by Aeronomix (Guillaume G)
We will greatly miss Al Nagler, founder of Tele Vue Optics (@televueoptics.bsky.social), who left us Monday. I was honored to know him: a brilliant man with a gentle and joyful disposition. Among many other accomplishments, he designed the Wide Field Imager optics in use on the PUNCH mission. ☀️🔭
Al Nagler (1935–2025)
Albert H. Nagler, a pioneer of telescope optics, passed away at the office of his company Tele Vue Optics on Monday, October 27th.
skyandtelescope.org
October 29, 2025 at 3:33 PM
We will greatly miss Al Nagler, founder of Tele Vue Optics (@televueoptics.bsky.social), who left us Monday. I was honored to know him: a brilliant man with a gentle and joyful disposition. Among many other accomplishments, he designed the Wide Field Imager optics in use on the PUNCH mission. ☀️🔭
Reposted by Aeronomix (Guillaume G)
Spectacular time-lapse image of Comet Lemmon (C/2025 A6), taken by astrophotographer Michael Jäger.
There might have been, um, a few satellites passing by during the long exposure. 🧪🔭
forum.vdsastro.de/viewtopic.ph...
There might have been, um, a few satellites passing by during the long exposure. 🧪🔭
forum.vdsastro.de/viewtopic.ph...
October 28, 2025 at 7:31 PM
Spectacular time-lapse image of Comet Lemmon (C/2025 A6), taken by astrophotographer Michael Jäger.
There might have been, um, a few satellites passing by during the long exposure. 🧪🔭
forum.vdsastro.de/viewtopic.ph...
There might have been, um, a few satellites passing by during the long exposure. 🧪🔭
forum.vdsastro.de/viewtopic.ph...
Finally, the big report about the impact of space weather on exoplanets is here!!!
authors.library.caltech.edu/records/gmhk...
authors.library.caltech.edu/records/gmhk...
The Exospace Weather Frontier
Space weather is among the most powerful and least understood forces shaping planetary atmospheres. We observe its effects directly on Solar System bodies through atmospheric escape, chemical disrupti...
authors.library.caltech.edu
October 28, 2025 at 7:21 PM
Finally, the big report about the impact of space weather on exoplanets is here!!!
authors.library.caltech.edu/records/gmhk...
authors.library.caltech.edu/records/gmhk...
Reposted by Aeronomix (Guillaume G)
From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.
October 27, 2025 at 4:11 PM
From a crewmember on yesterday's Teal 74 mission into now-Category 5 Hurricane #Melissa. As clear of an eye as you will see in the Atlantic basin.
Reposted by Aeronomix (Guillaume G)
A lire si vous avez l'estomac (et le mental) bien accroché 😅👍
Aujourd'hui, on attendu après le petit déj' pour vous raconter la guerre permanente que livre l'Humanité contre une bestiole dévoreuse de chair qui veut littéralement notre peau.
On parle soldats irradiés, largages de masse, fronts de milliers de km...
histoiresenmarge.kessel.media/posts/pst_1a...
On parle soldats irradiés, largages de masse, fronts de milliers de km...
histoiresenmarge.kessel.media/posts/pst_1a...
La guerre sans fin
Où l'on découvre que pendant que nous vaquons à nos activités triviales, l'humanité mobilise au quotidien des millions de soldats pour repousser la menace constante d'une force d'invasion dont l'objec...
histoiresenmarge.kessel.media
October 23, 2025 at 11:45 AM
A lire si vous avez l'estomac (et le mental) bien accroché 😅👍
It is Monday evening in France, early afternoon in eastern US. The shutdown has lasted, so far, about 10 times more than the latest French government....
October 6, 2025 at 5:17 PM
It is Monday evening in France, early afternoon in eastern US. The shutdown has lasted, so far, about 10 times more than the latest French government....
Reposted by Aeronomix (Guillaume G)
Another reason why the metric system is superior.
October 3, 2025 at 7:31 PM
Another reason why the metric system is superior.
Reposted by Aeronomix (Guillaume G)
☄️ La comète interstellaire 3I/ATLAS passe en ce moment au plus près de Mars (à ~30 millions de km). La nuit dernière, le rover Perseverance a pointé sa caméra Mastcam-Z vers le ciel. Et il semblerait bien qu'il l'ait observée 🤩 On voit un petit nuage qui se trouve parfaitement là où on l'attendait 🤯
October 3, 2025 at 8:58 AM
☄️ La comète interstellaire 3I/ATLAS passe en ce moment au plus près de Mars (à ~30 millions de km). La nuit dernière, le rover Perseverance a pointé sa caméra Mastcam-Z vers le ciel. Et il semblerait bien qu'il l'ait observée 🤩 On voit un petit nuage qui se trouve parfaitement là où on l'attendait 🤯