Our #JUICE spacecraft captured comet #3IATLAS during its active phase, showing its glowing coma, plasma tail, and maybe even a dust tail. The full data will arrive in February, but here is a sneak preview from JUICE's navigation camera. More info 👉 www.esa.int/ESA_Multimed...

Gracefully carving through the solar corona, a mini eruption of filament plasma erupted from the Sun earlier today! Beautiful.

This is how it feels right now...

2 décembre 1995 30ème anniversaire du lancement de la sonde européenne SoHO. Retrouvez mon article des 20 ans spacerelics.blogspot.com/2015/12/20em...

The scale of today's X1.9 CME compared to the Earth. Truly a monstorous eruption.

Goodness, that is a violent CME launching with this ongoing X-class flare. Look at the motion of the field lines close to the AR and the whipping of the solar atmosphere as a blast wave propagates away. I still don't think Earth will see much if anything at all, but we'll see.

Il semblerait qu'airbus ait besoin d'un spécialiste dans les interactions entre les rayons cosmiques (et les SEPs) et la matière aux altitudes de vol...

This is like a big deal story. A320s are an extremely popular aircraft. That is *a lot* of flights — and a lot of people impacted. Cursed G2V stellar object. More like a wrathful Ra!

My fridge status: the leftovers Swiss chard pie is safety held by the load bearing brie

3I/ATLAS, the interstellar comet passing through our solar system, might have been radically transformed by cosmic rays over billions of years, altering it so thoroughly that we may never be able to work out where it came from.

THE GOLDEN COMET IS FALLING APART (2) Last week, California astronomer Dan Bartlett pointed his telescope at golden comet C/2025 K1 (ATLAS) to capture a close encounter with the Leo Triplet of galaxies. He quickly realized something was wrong spaceweathergallery2.com/indiv_upload...

🔭 Alors que sur Terre, on pouvait observer de belles aurores boréales ces derniers jours ; la même éruption solaire a temporairement aveuglé le télescope spatial Euclid 😅 www.euclid-ec.org/here-comes-t... 📸 Konrad Kuijken / Euclid Consortium / ESA

Those were beautiful #aurorae in the past days. A solar storm brought a lot of protons to Earth. Not only to Earth but also to #ESAEuclid – but does #Euclid notice? Oh yes. www.euclid-ec.org/here-comes-t... #ESA #Sun #SpaceWeather #space

This is wild! Here is a mosaic image combining satellite passes from NOAA 21, Suomi NPP, and NOAA 20 showing the auroral oval very extended during the geomagnetic storm earlier this week. I have annotated where the typical auroral oval rests over the north geomagnetic pole.

one thing we should, but probably won’t, take away from the Epstein emails is that it’s a massive risk to tie academic funding to philanthropy

NASA's just-launched ESCAPADE mission is trying out a novel trajectory to Mars, one that's slower but allows much more flexible launch dates. The flight path also provides a bonus science session at the L2 equilibrium point near Earth. 🧪🔭 skyandtelescope.org/astronomy-ne...

🌍 Splendide photo satellite au-dessus du pôle Nord montrant les aurores boréales des dernières nuits 😍

Super: le communiqué est aussi en Français www.aeronomie.be/fr/nouvelles...

Interstellar Comet 3I/ATLAS is fragmenting on its way back out from the Sun. 🧪🔭 www.virtualtelescope.eu/2025/11/13/c...

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!

Hampton, va, right now

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...

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...

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)

This could be interesting! (I wish I lived a little north from my place)

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)

Thank you! 😻

j'en ai toujours 2 ou 3 dans ma réserve, avec le petit panier à cornichon

You are a Post-Padawan now!

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.

🔭 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?...

😪 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 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. ☀️🔭

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...

Finally, the big report about the impact of space weather on exoplanets is here!!! authors.library.caltech.edu/records/gmhk...

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.

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....

Another reason why the metric system is superior.

☄️ 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 🤯

🎂 60 ans d’aventures stratosphériques à Aire-sur-l’Adour ! Depuis 1964, ce site historique du #CNES est le “stratoport” de nos ballons : recherche atmosphérique, innovation et formation des équipes 🎈 📸 Retour en images ➡️ cnes.fr/actualites/r... #Ballons #Stratosphère

Well, I did some simulations to show that a manuscript's claims were bad, sent my explanation to the journal (a respectable one) with a suggestion to make major modifications... and they decided to publish "as it is". I am going to refuse reviewing for a little while (and publish elsewhere)

I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA 10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)

Great news! SWFO-L1 successfully launched at 7:32am EDT, Sep 24, and a successful acquisition of signal has been received. This NOAA satellite is the first designed specifically for continuous, operational space weather observations. This includes solar wind and coronagraph measurements.