#iau — Public Fediverse posts

So... is this giving "microscope" to you or....?

Find out our first impressions and how this part of the night sky became #Microscopium on this week's episode: https://starrytimepodcast.podbean.com/e/microscopium-cosmic-background/

#CosmicBackground #Astronomy #constellations #StarryTime #history #astronomers #stars #IAU #StarCharts

📷 :https://en.wikipedia.org/wiki/Microscopium#/media/File:Constellation_Microscopium.jpg

So... is this giving "microscope" to you or....?

Find out our first impressions and how this part of the night sky became #Microscopium on this week's episode: https://starrytimepodcast.podbean.com/e/microscopium-cosmic-background/

#CosmicBackground #Astronomy #constellations #StarryTime #history #astronomers #stars #IAU #StarCharts

📷 :https://en.wikipedia.org/wiki/Microscopium#/media/File:Constellation_Microscopium.jpg

"@nasaadmin's initiative could catalyze fresh research and discussion within the astronomical community, potentially leading to proposals that challenge or refine the @iau_org criteria. At the same time, it risks being seen as a distraction during a period when many fear for the future of space science funding."

https://dailygalaxy.com/2026/04/nasa-chief-calls-make-pluto-planet-again/

#IAU #NASA #Astronomy #PlanetaryScience

"@nasaadmin's initiative could catalyze fresh research and discussion within the astronomical community, potentially leading to proposals that challenge or refine the @iau_org criteria. At the same time, it risks being seen as a distraction during a period when many fear for the future of space science funding."

https://dailygalaxy.com/2026/04/nasa-chief-calls-make-pluto-planet-again/

#IAU #NASA #Astronomy #PlanetaryScience

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.

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

"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

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

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

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

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

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

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

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

🌕 🔭 🥰
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?

🌕 🔭 🥰
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

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

Satellite Constellations Are Too Bright for Astronomy

https://skyandtelescope.org/astronomy-news/satellite-constellations-are-too-bright-for-astronomy/ via Sky and Telescope

#iau #satellites #constellation #lightpollution #astronomy #Starlink #BlueBird #Qianfan #Guowang #OneWeb #Kuiper

While noting that they are under no legal obligation to do so, "the @iau_org has recommended brightness limits for #satellites, but companies aren’t abiding by them."

https://skyandtelescope.org/astronomy-news/satellite-constellations-are-too-bright-for-astronomy/

#Astronomy #IAU

While noting that they are under no legal obligation to do so, "the @iau_org has recommended brightness limits for #satellites, but companies aren’t abiding by them."

https://skyandtelescope.org/astronomy-news/satellite-constellations-are-too-bright-for-astronomy/

#Astronomy #IAU

@VRubinObs : Images 🌌 are read from the camera’s 3.2 billion pixels in just two seconds. From there, the data travels down the Cerro Pachón mountain, through #SouthAmerica, and around the world to international data centers. Within minutes ⏱️, potential #asteroid ☄️ detections are processed and reported to the #IAU’s Minor Planet Center.

“You’re getting a new image every 40 seconds, every night, for ten years" https://www.seti.org/news/nsf-doe-rubin-observatory-first-look-stunning-images-and-asteroids-aplenty

#Astronomy

@VRubinObs : Images 🌌 are read from the camera’s 3.2 billion pixels in just two seconds. From there, the data travels down the Cerro Pachón mountain, through #SouthAmerica, and around the world to international data centers. Within minutes ⏱️, potential #asteroid ☄️ detections are processed and reported to the #IAU’s Minor Planet Center.

“You’re getting a new image every 40 seconds, every night, for ten years" https://www.seti.org/news/nsf-doe-rubin-observatory-first-look-stunning-images-and-asteroids-aplenty

#Astronomy

🚀 Oh joy, another interstellar rock is floating by, and the International Astronomical Union is throwing a party with more acronyms than you can shake a telescope at. 🎉🌌 Their endless maze of links and databases will have you questioning if the real #discovery isn't the third object, but the first hint of organization. 📚🔍
https://minorplanetcenter.net/mpec/K25/K25N12.html #interstellarrocks #IAU #spaceparty #astronomy #HackerNews #ngated

🚀 Oh joy, another interstellar rock is floating by, and the International Astronomical Union is throwing a party with more acronyms than you can shake a telescope at. 🎉🌌 Their endless maze of links and databases will have you questioning if the real #discovery isn't the third object, but the first hint of organization. 📚🔍
https://minorplanetcenter.net/mpec/K25/K25N12.html #interstellarrocks #IAU #spaceparty #astronomy #HackerNews #ngated

📸 25 Brightest Stars in the Night Sky
Many of the brightest stars have names passed down through ancient cultures. This image shows 25 of them in true color with their IAU-recognized names. From Sirius (“the scorcher”) to Antares (“rival to Mars”), each star tells a story.
📅 June 11, 2025
📷 Tragoolchitr Jittasaiyapan
🔗 https://stellarsnap.space
#APOD #BrightestStars #Astronomy #StellarSnap #IAU #CulturalAstronomy

#Astronomie #Planeten

@mina
Guter Punkt!

Amelia sollte das wissen. @admin

Einstweilen tut's auch die #NASA:

https://science.nasa.gov/solar-system/planets/what-is-a-planet/

Gemäß #IAU ist die Form der Umlaufbahn wohl derzeit kein Kriterium:

"A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit."

@evelynefoerster

#Astronomie #Planeten

@mina
Guter Punkt!

Amelia sollte das wissen. @admin

Einstweilen tut's auch die #NASA:

https://science.nasa.gov/solar-system/planets/what-is-a-planet/

Gemäß #IAU ist die Form der Umlaufbahn wohl derzeit kein Kriterium:

"A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit."

@evelynefoerster

L’astronomia dalla A alla Z nel nuovo glossario dell’Unione Astronomica Internazionale

https://edu.inaf.it/news/per-la-scuola/astronomia-glossario-unione-astronomica-internazionale/

Come si misurano le magnitudini? In che direzione è lo zenit? Che differenza c’è tra materia oscura e antimateria? La risposta a queste e molte altre domande nel Glossario multilingue OAE, ora disponibile anche in italiano.

#astronomia #didatticaAstronomia #glossario #IAU #OAECenterItaly

BTW, I sent a message to the #IAU executive and asked them to think about how to secure critical science data infrastructure and databases. Not sure, they can do much on short notice, but I hope there will be more strategic planning. We will need redundant services and mirrors around the world. #astrodon #astronomy

BTW, I sent a message to the #IAU executive and asked them to think about how to secure critical science data infrastructure and databases. Not sure, they can do much on short notice, but I hope there will be more strategic planning. We will need redundant services and mirrors around the world. #astrodon #astronomy

#Heise:
"
Nach der Göttin der Türgriffe: Quasisatellit der Erde heißt jetzt Cardea

Der nächste Quasisatellit im Sonnensystem hat jetzt einen offiziellen Namen. Cardea ist ein Begleiter der Erde und wurde schon vor mehr als 20 Jahren entdeckt.
"
https://www.heise.de/news/Nach-der-Goettin-der-Tuergriffe-Quasisatellit-der-Erde-heisst-jetzt-Cardea-10254247.html

https://www.wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_001.pdf

23.1.2025

#2004GU9 #Astronomie #Cardea #Himmelskörper #IAU #Quasisatellit #Sonnensystem #WGSBN

#Heise:
"
Nach der Göttin der Türgriffe: Quasisatellit der Erde heißt jetzt Cardea

Der nächste Quasisatellit im Sonnensystem hat jetzt einen offiziellen Namen. Cardea ist ein Begleiter der Erde und wurde schon vor mehr als 20 Jahren entdeckt.
"
https://www.heise.de/news/Nach-der-Goettin-der-Tuergriffe-Quasisatellit-der-Erde-heisst-jetzt-Cardea-10254247.html

https://www.wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_001.pdf

23.1.2025

#2004GU9 #Astronomie #Cardea #Himmelskörper #IAU #Quasisatellit #Sonnensystem #WGSBN

#Heise:
"
Nach der Göttin der Türgriffe: Quasisatellit der Erde heißt jetzt Cardea

Der nächste Quasisatellit im Sonnensystem hat jetzt einen offiziellen Namen. Cardea ist ein Begleiter der Erde und wurde schon vor mehr als 20 Jahren entdeckt.
"
https://www.heise.de/news/Nach-der-Goettin-der-Tuergriffe-Quasisatellit-der-Erde-heisst-jetzt-Cardea-10254247.html

https://www.wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_001.pdf

23.1.2025

#2004GU9 #Astronomie #Cardea #Himmelskörper #IAU #Quasisatellit #Sonnensystem #WGSBN

#Heise:
"
Nach der Göttin der Türgriffe: Quasisatellit der Erde heißt jetzt Cardea

Der nächste Quasisatellit im Sonnensystem hat jetzt einen offiziellen Namen. Cardea ist ein Begleiter der Erde und wurde schon vor mehr als 20 Jahren entdeckt.
"
https://www.heise.de/news/Nach-der-Goettin-der-Tuergriffe-Quasisatellit-der-Erde-heisst-jetzt-Cardea-10254247.html

https://www.wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_001.pdf

23.1.2025

#2004GU9 #Astronomie #Cardea #Himmelskörper #IAU #Quasisatellit #Sonnensystem #WGSBN

#Heise:
"
Nach der Göttin der Türgriffe: Quasisatellit der Erde heißt jetzt Cardea

Der nächste Quasisatellit im Sonnensystem hat jetzt einen offiziellen Namen. Cardea ist ein Begleiter der Erde und wurde schon vor mehr als 20 Jahren entdeckt.
"
https://www.heise.de/news/Nach-der-Goettin-der-Tuergriffe-Quasisatellit-der-Erde-heisst-jetzt-Cardea-10254247.html

https://www.wgsbn-iau.org/files/Bulletins/V005/WGSBNBull_V005_001.pdf

23.1.2025

#2004GU9 #Astronomie #Cardea #Himmelskörper #IAU #Quasisatellit #Sonnensystem #WGSBN

In August, the International Astronomical Union (#IAU) General Assembly was held in Cape Town. As the first time the meeting had come to Africa, and as one of the largest meetings for the international astronomy community, we knew we had to go hybrid.

Our team at @futuremeetings created a full virtual venue that was accessible via web browser, smartphone and #VR, in addition to broadcasted talks and Slack channels.

Here's how we did this (Nature Astronomy article): https://rdcu.be/d5qPD

In August, the International Astronomical Union (#IAU) General Assembly was held in Cape Town. As the first time the meeting had come to Africa, and as one of the largest meetings for the international astronomy community, we knew we had to go hybrid.

Our team at @futuremeetings created a full virtual venue that was accessible via web browser, smartphone and #VR, in addition to broadcasted talks and Slack channels.

Here's how we did this (Nature Astronomy article): https://rdcu.be/d5qPD

Just improved the #IAU available public domain structured data on #wikidata

Passed from 70 universities to 452 identified & documented members.

Feel free to add more: #opendata works better with crowdsourced help. 😀

https://m.wikidata.org/w/index.php?limit=500&title=Special:WhatLinksHere/Q284199

Just improved the #IAU available public domain structured data on #wikidata

Passed from 70 universities to 452 identified & documented members.

Feel free to add more: #opendata works better with crowdsourced help. 😀

https://m.wikidata.org/w/index.php?limit=500&title=Special:WhatLinksHere/Q284199

Dear geodesists, astronomers, and astrophysicists: Does any of you know of some publication that explicitly reports the expression for the metric in a Geocentric Terrestrial Reference System (GTRS) or in the more specific International Terrestrial Reference System (ITRS)?

Various publications (eg https://doi.org/10.1086/378162) and textbooks (eg https://doi.org/10.1017/CBO9781139507486) report and discuss the metrics for the Geocentric Celestial Reference System (GCRS), but not for the GTRS. (Even though it seems to me that the expression should be formally identical, as the off-diagonal timelike components take care of rotation).

Cheers! (Sorry for spamming borderline hashtags.)

#iau #geodesy #astronomy #physics #generalrelativity #astrophysics #internationalastronomicalunion

Her name is Ahoo Daryaei (آهو_دریایی).
Say her name.
Break the silence.
Let this go viral!
#AhooDaryaei #AhouDaryaei #freeAhooDaryaei

(picture by Hamed Shamloo)

RT @Bijan63/@[email protected]:

Haar naam is Ahoo Daryaei.
Noem haar naam.
Doorbreek de stilte.
Laat dit viraal gaan!
#AhooDaryaei

https://x.com/Bijan63/status/1853135469925564745 ⦾ https://xcancel.com/Bijan63/status/1853135469925564745 ⦾ https://www.iranintl.com/en/202411025012 #WomanLifeFreedom #IranHumanRights #IAU #Tehran #cartoons #HamedShamloo @[email protected]

Wondering if there are any asteroids that had to be renamed because the person they were named after turned out to be a fucking monster (or History proved what a fucking monster they were)

#Asteroids #IAU #Space