Happy to see the statement on #universityrankings by the International Association of Universities #IAU, the largest and most international university network: https://iau.global/news/iau-note-on-rankings-released. Sort of proud to have played a role in that. Moving away from rankings, step by step. I look forward to seeing similar statements from #LERU, #TheGuild, #AURORA, #YERUN and others. Solidarity among institutions is crucial amidst authoritarianism and commercial capture.

"The mean apparent magnitude of Amazon Leo #satellites is 6.28 based on 1,938 observations. For spacecraft in their operational mode, 92% exceeded the brightness limit recommended by the #IAU for interference with research, while 25% distract from aesthetic appreciation of the night sky. The reflective characteristics are similar to Version 1 #Starlink spacecraft."

https://arxiv.org/abs/2601.07708

#Space #Astronomy

Silver and Gold, #SLV and #IAU...
https://youtu.be/JrpLh7N67m0?si=uyw3kUq1uwPmg3Oe

Con gli occhi al cielo, dall’Italia al Sahara

https://edu.inaf.it/news/eventi/report/rete-saharawi-italia-inaf/

Le attività astronomiche realizzate durante il programma di accoglienza dei Piccoli Ambasciatori di Pace Saharawi in Italia

#astronomia #IAU #pace #Saharawi

@astronomia @astronomia

The reason I am in Argentina

More info here: https://congresos.unlp.edu.ar/astralx/

I'm really excited to teach here - I wanted to do one of the capacity building workshops for a while.

#astrodon #XraysAreTheBestRays #iau #cospar #astrophysics

A message from Lidia Oskinova, President of the IAU commission G2 Massive Stars:

"Everybody is welcome to join an on-line seminar on December 1st (Monday!) at 16:00 CET

Title: What Stars Are Made Of: Celebrating One Hundred Years of Cecilia Payne-Gaposchkin's Revolutionary PhD Thesis

Speaker: Floor Broekgaarden (University of California San Diego)

https://rediris.zoom.us/j/6313376939?pwd=akRrd2dmb3dnbDN0MmRCallTTHlLQT09&omn=95383862762

A century ago, Cecilia Payne-Gaposchkin's PhD thesis, Stellar Atmospheres, transformed our understanding of the Universe. Famously described by Otto Struve as "the most brilliant PhD thesis ever written in astronomy", Payne-Gaposchkin's work revealed that stars are composed primarily of hydrogen and helium - an insight that overturned the prevailing belief that stars shared Earth's composition.

We invite you to celebrate the centennial of this landmark achievement and to reflect on the courage, creativity, and intellectual clarity that defined Cecilia's science. [...]"

https://massivestars.org/seminars/#20251201

#IAU #OnlineTalk

Discover how Indian landmarks, including Kerala`s Periyar River & Varkala Beach, are now on Mars! https://english.mathrubhumi.com/news/kerala/kerala-places-get-a-martian-address-periyar-varkala-bekal-among-new-names-on-mars-vyu2alh5?utm_source=dlvr.it&utm_medium=mastodon #Mars #India #Kerala #IAU

Names Approved for Mars:
https://planetarynames.wr.usgs.gov/News?page=1

Valiamala (Home of IIST in state of Kerala)
https://planetarynames.wr.usgs.gov/Feature/16435

Thumba (Birth place of Indian Space Programme)
https://planetarynames.wr.usgs.gov/Feature/16437

Krishnan and Krishnan Palus ( M. S. Krishnan (Indian geologist) )
https://planetarynames.wr.usgs.gov/Feature/16434
https://planetarynames.wr.usgs.gov/Feature/16439

Varkala (Geo-heritage site in Kerala)
https://planetarynames.wr.usgs.gov/Feature/16436

Bekal (Town in Kerala)
https://planetarynames.wr.usgs.gov/Feature/16438

Periyar Vallis (River in Kerala)
https://planetarynames.wr.usgs.gov/Feature/16440

#Kerala #IAU #Mars

Everything back now! What a start for the workshop 😅 #ShawIAU25 #IAU #astronomy #education

First day attending the Shaw-IAU Workshop (remote) and it was hit by the Cloudflare down while I was having lunch...

#ShawIAU25 #Cloudflare #CloudflareDown #IAU #astronomy #education #SciComm

Message from the International Astronomical Union #IAU:

IAU Hands-On Workshops - Call for Proposals for Workshops in 2026

The IAU calls for applications to organize workshops under the IAU Hands-On Workshops (I-HOW) initiative. These workshops aim at training early-career scientists from developing countries in accessing, reducing, and analysing the vast amount of data available in astronomical archives across the world, and using them for their research projects. Proposals to organise one of these workshops shall be submitted using the application form provided on the website by email to one of the members of the I-HOW Steering Committee.

The deadline for applications is December 31, 2025.

More information on the characteristics of the initiative, the procedure and selection criteria for workshops, and a link to the application form are available at: https://www.iau.org/Iau/Iau/Science/Trainings---Workshops/I-HOW-Hands-On-Workshops.aspx

#IAU #Astrodon #Astronomy #IHOW #DataScience #Archives #COSPAR #Telescope #Observatory #VirtualObservatory

Torna lo Shaw-IAU Workshop: astron­omia, dati reali e didattica globale

https://edu.inaf.it/news/oae-italia/torna-lo-shaw-iau-workshop-astronomia-dati-reali-e-didattica-globale/

Dal 18 al 21 novembre 2025 torna lo Shaw-IAU Workshop on Astronomy for Education, promosso da OAE-Italy e aperto gratuitamente a docenti e divulgatori di tutto il mondo. L’edizione di quest’anno è dedicata alle galassie e alla didattica basata su dati astronomici reali, con sessioni replicate in diverse fasce orarie per favorire la partecipazione globale.

#didattica #didatticaAstronomia #divulgazione #IAU #oae #OAECenterItaly

@astronomia

📚 Eugène Delporte definierte vor 100 Jahren die Grenzen der Sternbilder.

• 🔭 Festlegung von 88 Sternbildern.
• 🌌 Auftrag der Internationalen Astronomischen Union.
• 🌠 Ordnung am Himmel durch definierte Grenzen.

https://www.deutschlandfunk.de/eugene-delporte-astronom-sternbilder-100.html

#Astronomie #Sternbilder #EugèneDelporte #IAU #Weltraum

L’INAF e la rete NOC Italia per le 100 ore di Astronomia della IAU

https://edu.inaf.it/news/eventi/inaf-iau-100-ore-astronomia-2025/

In occasione della 100 ore di astronomia e della Observe the Moon night, l’INAF ha organizzato una serie di eventi per avvicinarci alle stelle: scopriamoli insieme!

#100OreAstronomia #astronomia #IAU #INAF #oae #OAECenterItaly #oaeItalia

🌕 🔭 🥰
2️⃣ ➡️ 3️⃣
Regiones interesante en la #Luna.
Usando la cámara #ZWO ASI 224MC y el menor de los #Maksutov de #Skywatcher... El 90x1250.

Grandes impactos sobre la superficie lunar... Y otros no tanto.

¿Cuántos cráteres tiene nuestro satélite natural?
Según Wikipedia, la #IAU reconoce 9.137 actualmente...
https://es.wikipedia.org/wiki/Cráteres_lunares

🤔😅
¿Tendremos oportunidad de captar en algún momento un impacto en directo?

New #openaccess publication #SciPost #Physics Core

Ground state analysis of the spin-1/2 XX chain model with anisotropic three-spin interaction

Nima Mahboob, Saeed Mahdavifar, Fatemeh Khastehdel Fumani
SciPost Phys. Core 8, 050 (2025)
https://scipost.org/SciPostPhysCore.8.3.050

#GuilanUniversity #IAU

🟠 Udkadua (λ And) – HIP 116584 Sumerian for “Storm Demon with the Gaping Mouth” ⚡ — from a 3,000-year-old Babylonian timekeeping asterism 📜 G8IVK yellow-orange subgiant: 🌡️ 4,633 K | 1.47 M☉ | mag 3.82 📍 Hand of Andromeda, near Cassiopeia ✅ IAU-approved 2025 #WGSN #IAU #Udkadua #Andromeda #StarNames

🟡 Honores (7 And) – HIP 114570 Latin for “honours” — from Bode’s Enlightenment-era constellation (1801) 📜 F1V main-sequence: 🌡️ 7,380 K | 1.6 M☉ | mag 4.52 📍 Left arm of Andromeda ✅ IAU-approved 2025 #WGSN #IAU #Honores #Andromeda #StarNames #CulturalAstronomy

🟠 Paradys (α Apodis) – HIP 72370 Dutch for “bird of paradise,” named by Plancius in 1598 🗺️ K3III orange giant: 🌡️ 4,090 K | 59.5 R☉ | 4.46 M☉ | mag 3.79 📍 Tail of Apus, decl. –79° ✅ IAU star name (2025) #WGSN #IAU #Paradys #Apus #StarNames #AllSkies