New lecture from my solar system class is online- all about the origin of the moon, and why we think a giant impact is to blame! 🌔 🔭🧪🎢 youtu.be/eNOQvv_90Kc

2,700-Year-Old Total Solar Eclipse Observations Give Insight to Our Ancient Solar System (and to Earth Rotation) www.discovermagazine.com/2-700-year-o...

I'm best known these days for visualizing Gaia Mission data but I've also tried my hand at visualizing HI velocity data. Here, for example, is a slice of HI4PI. I'd love to see more papers about HI4PI.

Gaia DR4 is expected to be released in December 2026, so today is a good day to start the countdown! Why is Gaia DR4 going to be so exciting? Here are several reasons. kevinjardine.dev/blog/post-13/

I wrote some articles on Medium, starting with this one, and I expect I’ll write more soon. medium.com/@steve.desch...

Interstellar comet 3I/ATLAS is erupting in ‘ice volcanoes’, new images suggest Comet 3I/ATLAS appears to have spiral jets shooting off its surface, which the authors of a new preprint interpret as a type of cryovolcanism. (Image credit: Josep M. Trigo-Rodríguez/B06 Montseny Observatory) The…

From Alexandra Masegian @spiralgalexy.bsky.social : Today’s bite explores how munching on tiny black holes can lead stars to an early demise. ⚛️🔭☄🧪 astrobites.org/2025/11/29/t...

Story time! The star Betelgeuse gets its name from Arabic يد الجوزاء <Yad al-Jawzāʾ>: "Hand of Orion" (kind of, see below). In the 1200s this was misread as بد الجوزاء <Bad al-Jawzāʾ>, and was transliterated into Latin as "Bedalgeuze." 🧵 1/10

Just got this very cool @saltandpeppergames.bsky.social tabletop RPG (h/t @stewartbrookes.bsky.social)! The designers did a great job re-imagining the images, and gameplay is divided into the manuscript's six sections. #Voynich himself is a character! Can't wait to try it with my family.

#IMC2026, Weds, 8 July, 7pm! Four medievalists who've published 'trade' books will discuss the process - from finding an agent to working with publishers & beyond. Sponsored by @ihr.bsky.social. @realmandeville.bsky.social @saracharles.bsky.social @eleanormaybaker.bsky.social @imc-leeds.bsky.social

=== El astrofísico Steve Desch (Arizona State University), entre otros, ha calificado las afirmaciones de Loeb como "sensacionalismo ridículo" que representa un "verdadero colapso del proceso de revisión por pares y el método científico" === www.newstecnicas.info.ve/2025/11/avi-...

Avi has risen to new levels of Galilean messiah-complex absurdity, implying that the latest calculations of 3I/ATLAS’ trajectory were made to counter his claim of alien intelligence directing where the comet is headed. 🔭

From Skylar Grayson @skylargrayson.bsky.social : Today’s paper explores how a potential bias in the way we calculate the distance to galaxies impacts our understanding of dark energy. ⚛️🔭☄🧪 astrobites.org/2025/11/26/s...

🚨 ATENÇÃO: o Congresso avalia hoje os vetos do Governo do Brasil ao PL do Licenciamento Ambiental. ⚠️ Derrubar os vetos do Governo é transformar o PL do Licenciamento no PL da Devastação. 👉 Defenda o nosso meio ambiente e o nosso futuro! 📲 Digital/PR

"Tracking the Activity of the Interstellar Object 3I/ATLAS through Its Perihelion" by Eubanks et al DOI: 10.3847/2515-5172/ae23c8 On behalf of the American Astronomical Society (AAS), we are pleased to let you know that your article has now been published at doi.org/10.3847/2515...

O Governo do Brasil segue avançando no combate ao crime organizado. A Receita Federal, em conjunto com órgãos parceiros, realizou nesta quinta (27) a Operação Poço do Lobato para combater um esquema internacional de sonegação e lavagem de dinheiro. 👇

So could it be that dark matter is not so dark? 🤔 www.theguardian.com/science/2025...

This is an incredible image of comet 3I/ATLAS, taken by Satoru Murata ICQ Comet Observations group on 16 November 2025 from western New Mexico. Structure within the major dust tail from the comet is clearly visible, together with two smaller jets trailing the nucleus and maybe even an anti-tail.

#3IATLAS update: still a comet, despite Avi’s best efforts. (www.facebook.com/share/p/17YT...)

there's a video about it and everything! www.youtube.com/watch?v=aY98...

É hora de estatizar o Banco Central, por Luís Nassif Ou o Banco Central retoma sua função de instituição pública ou o Brasil se tornará a maior lavanderia do planeta. jornalggn.com.br/coluna-econo...

The discussion of the 3I/ATLAS comet here on Bluesky vs Twitter shows exactly how bad Twitter has become, especially for science. Here, it's enthusiasts and astronomers. There, it is disinfo accounts with millions of likes swearing it's aliens and that NASA is covering it up.

From Neev Shah @neevshah101.bsky.social : Do black holes have a family tree? Read more in today’s bite! ⚛️🔭☄🧪 astrobites.org/2025/11/21/g...

Interstellar Comet 3I/ATLAS just delivered its best color image yet—blue CO+ tail, green C₂ head, all classic comet stuff. The twist? A jet is blasting toward the Sun while the tail streams away. Interstellar visitors love drama. More at spaceweather.com. #CometATLAS #3IATLAS #Astronomy

I've been working on the procedural generation of galaxies in #GaiaSky for a while now. The system is already able to generate different morphologies, but I'm still tuning it. Below is an example of 3 random galaxies for every Hubble sequence morphology. Full resolution: i.postimg.cc/h4sNWVFH/hub...

New video from my astronomy lecture series! All about the Earth's atmosphere- how it came to form to its current composition, the greenhouse effect, and climate change. youtu.be/DnhPm73Reho

Soon after its discovery, 3I/ATLAS looked very much like other objects we have seen. Here is a plot of the typical asteroid color-color space. It is such an interesting object, but it is not an anomaly in so many of these parameter spaces in ANY way

‘Yellow’ is related to Dutch ‘geel’ and German ‘gelb’, but their ends are quite different. Why? Their common Germanic ancestor had different stems for different case forms. ‘Yellow’ and ‘gelb’ come from the stem that was used in most cases, while ‘geel’ continues the nominative case. Here’s more:

Thanks to Chris Young at Interesting Engineering for the chance to contextualize 3I/ATLAS. I would have preferred two thumbnails of the comet itself, but... enjoy. interestingengineering.com/space/3i-atl...

"The fallacies behind the cult of Loeb" New entry in my blog. Other articles have covered the scientific aspects; this one reflects on the social phenomenon. I argue it’s driven by a series of fallacies tinieblasyestrellas.blogspot.com/2025/11/the-...

It looks like our interstellar visitor 3I/ATLAS has finally gotten a dust tail. Very nice picture from ICQ Comet Observations Satoru Murata 2025-11-16 11:53:50~12:23:20 UTC New Mexico, USA

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.

🚨 ATENÇÃO! 🚨 O Governo do Brasil enviou o Projeto de Lei Antifacção para endurecer o combate ao crime organizado. Mas os relatórios apresentados na Câmara dos Deputados insistem em mudanças que limitam a atuação da Polícia Federal. 👇

Avi Loeb really is the Dr. Oz of astronomy now. Impressive CV but full of pseudoscience so no one in the field likes him any more. 🔭

3I/ATLAS Update: would you believe it? It’s *still* a comet. 🔭 (www.virtualtelescope.eu/2025/11/11/i...)

Why are planetary scientists, astrobiologists and and SETI scientists so negative (pissed off, even) about Avi Loeb’s repeated claims that 3I/Atlas may be an invading alien spaceship? 🧵 🧪🔭🛸 (1/7)

🚨ATENÇÃO!🚨 ⚠️ O Governo do Brasil enviou ao Congresso o Projeto de Lei Antifacção para endurecer o combate ao crime organizado no Brasil. Com o relatório apresentado hoje na Câmara dos Deputados, no entanto, o PL pode ter o efeito oposto. 👇

Cosas interesantes para aprender más sobre el 3I/ATLAS. Que no olvidemos que es un objeto interestelar de gran interés científico in.mashable.com/science/1022...

O que explica a força destrutiva do tornado no Paraná Análise técnica confirma que supercélula gerou fenômeno F3 com ventos recordes, destruindo 90% dos imóveis em Rio Bonito do Iguaçu jornalggn.com.br/noticia/o-qu...

New morphology in the tail of comet 3I/Atlas will inevitably be spun by the quack Avi Loeb as some evidence of alien activity. This is nothing new, we've seen similar behavior in other comes including 17P, C/2016 R2, and C/1961 R1, and others. It's ionized carbon monoxide. #3I #3I/Atlas #Comet 🔭

A RARE GOLDEN COMET: Most comets are green, and sometimes blue. In June Lake, California, amateur astronomer Dan Bartlett is tracking a rare golden comet. Introducing, Comet ATLAS (C/2025 K1) spaceweathergallery2.com/indiv_upload... spaceweather.com

It‘s “Retain the Vital Jing” November

3I/ATLAS is behaving just as a comet should. No shenanigans. Looking forward to the possibility of JUICE (a European spacecraft heading eventually to Jupiter) observing this object in the coming weeks!

Have spent a substantial portion of the day turning down requests to comment to the media on Loeb's claims that 3I/ATLAS might be artificial. What was a really interesting science story has been ruined by one man ignorantly shouting. So frustrating.

uv makes installing and using Python *so* easy! It works on pretty much any computer and it's lightning fast. 🔭☄️ #astrocode If you're still using conda, pyenv, or... basically any other tool, then I can *highly* recommend switching:

🌟 Comet 3I/ATLAS brightens rapidly! 🌟 As it reached perihelion on Oct. 29, spacecraft watching the Sun saw a sudden surge in brightness. Scientists expect it to emerge from solar conjunction much brighter and easier to see from Earth. 🔭 Full story: Spaceweather.com

Sorry, but interstellar visitor 3I/ATLAS really is a comet, not aliens Interstellar objects like 3I/ATLAS are exciting, but there is no reason to claim that they are evidence of alien spacecraft – sometimes a comet is just comet, says Robin George Andrews Interest | Match | Feed