International Astronomical Union (IAU) @IAU_org Twitter profile

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International Astronomical Union (IAU)

@IAU_org

5 years

We have issued a statement on behalf of the International Astronomical Union (IAU) expressing our concern over #SatelliteConstellations : @elonmusk 's #starlink @IridiumComm @oneweb @Globalstar @amazon 's #ProjectKuiper @facebook 's #Athena

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International Astronomical Union (IAU)

@IAU_org

3 years

The Shaw Prize in Astronomy 2021 is awarded in equal shares to Victoria M Kaspi — @McGillMSI / @mcgillu & Chryssa Kouveliotou — @GWtweets for their contributions to our understanding of magnetars, a class of highly magnetized neutron stars. 🔗

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International Astronomical Union (IAU)

@IAU_org

4 years

After 977 proposals were received for the designated exoplanet system for #Brazil , IAU has announced the approved names of Tupi (star) and Guarani (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

5 years

Today we celebrate Women and Girls in Science Day! During the #IAU100 we strongly encourage the organization of activities throughout 2019, as the perfect opportunity to celebrate girls and women in science, space and astronomy. #WomenInAstronomy

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International Astronomical Union (IAU)

@IAU_org

4 years

100 000s of People from 112 Countries Select Names for Exoplanet Systems as part of the #IAU100 celebrations #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

2 months

The IAU CPS has released a paper entitled 'Call to Protect the Dark and Quiet Sky from Harmful Interference by Satellite Constellations' that states its recommendations for the mitigation of satellite constellations’ impact on astronomy.

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International Astronomical Union (IAU)

@IAU_org

7 years

IAU approved names for 12 features on Pluto, the first to be named after New Horizons flyby

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAU100 Celebrate Pale Blue Dot’s 30th Anniversary with Worldwide Activities Appreciating the Earth. This is the final IAU100 global project and will take place on and around 13-20 February 2020.

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International Astronomical Union (IAU)

@IAU_org

1 year

The IAU Office for Astronomy Outreach (OAO) invites everyone to participate in the 2023 Dark and Quiet Skies project, to be held in May. The programme includes many events throughout the month to raise awareness of the importance of dark and quiet skies.

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International Astronomical Union (IAU)

@IAU_org

1 year

IAU and Astronomy Groups Petition the UN to Address the Impact of Satellites on Dark and Quiet Skies Read more:

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnews What will be the impact of the planned mega-constellations of communication satellites on astronomical observations and on the pristine appearance of the night sky? Some preliminary findings:

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International Astronomical Union (IAU)

@IAU_org

11 months

The IAU Commission on Solar Activity (C.E2) under Division E Sun and Heliosphere represents members studying a wide range of dynamic phenomena produced by our nearest star, the Sun. Read their 2022 Annual Report (Ed. Georgoulis, M. K.) here

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International Astronomical Union (IAU)

@IAU_org

4 years

The IAU would like to clarify that a recent statement about the press coverage of the discovery of phosphine in the atmosphere of Venus originated from the Organizing Committee of the IAU Commission F3 and not from the IAU Executive, nor the IAU Commission F3 membership.

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International Astronomical Union (IAU)

@IAU_org

9 months

Starts today! The IAU Asia-Pacific Regional Meeting (APRIM) will be hosted from August 7 to 11, 2023, in hybrid mode, in-person at Koriyama, Japan and online. #APRIM2023

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International Astronomical Union (IAU)

@IAU_org

5 years

#IAU100 The IAU invites every country in the world to name an #exoplanet and its host star by launching #NameExoWorlds Credit: @IAU_org /L. Calçada

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International Astronomical Union (IAU)

@IAU_org

1 month

United Nations Agrees to Address Impact of Satellite Constellations on Astronomy.

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International Astronomical Union (IAU)

@IAU_org

4 years

1/6 We would like to follow up on the recent case of a statement from Commission F3 Organising Committee (OC) with regards to the press coverage of the discovery of phosphine on Venus.

International Astronomical Union | IAU

iau.org

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International Astronomical Union (IAU)

@IAU_org

2 years

To celebrate the 10th anniversary of our IAU Office for Astronomy Outreach (OAO), we are launching a contest to name 20 exoplanetary systems to be observed by Webb Telescope. Read the full Press Release here:

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International Astronomical Union (IAU)

@IAU_org

6 years

#IAUnomenclature IAU members have voted to rename the Hubble law into the Hubble–Lemaître law, to pay tribute to both #Lema ître and #Hubble for their fundamental contributions to the development of modern cosmology. Credit: IAU_org /M. Zamani

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnews The IAU has selected @HdAstro , an astronomy outreach centre based in Heidelberg, Germany, as the location for its new Office of Astronomy for Education (OAE). Credit: @HdAstro /M. Pösse

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUoutreach Numerous NOCs are supporting observations of the 21 June 2020 eclipse with livestreams, in-person events and educational resources See the NOC Eclipse Resource webpage here: Image credit: Stefan Seip

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International Astronomical Union (IAU)

@IAU_org

5 years

We have published a new booklet: "From Medicine to Wi-Fi; Technical Applications of Astronomy to Society", detailing developments in astronomy that have permeated throughout modern-day life. #IAU100 #IAUpublications

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUprize The recipients of the Gruber Foundation 2021 Cosmology prize were announced. This year's prize goes to Marc Kamionkowski ( @johnshopkins ), Uroš Seljak ( @ ucberkeley & @BerkeleyLab ) and Matias Zaldarriaga ( @the_IAS ).

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International Astronomical Union (IAU)

@IAU_org

6 years

The IAU releases new coordinate systems for solar system bodies Credit: IAU Working Group for Cartographic Coordinates and Rotational Elements

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International Astronomical Union (IAU)

@IAU_org

4 years

After 215 proposals were received for the designated exoplanet system for #Colombia , IAU has announced the approved names of Macondo (star) and Melquíades (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

2 years

#IAUnews The International Astronomical Union is pleased to announce the selection of @SKAO and @NOIRLabAstro as co-hosts of the new IAU Centre for the Protection of the Dark and Quiet Sky from Satellite Interference. Mike Lewinsky/CC BY 2.0

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International Astronomical Union (IAU)

@IAU_org

9 years

Hello Pluto!! #PlutoFlyby http://t.co/X8AcLW4GLD

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International Astronomical Union (IAU)

@IAU_org

5 years

The IAU 1919–2019: 100 Years Under One Sky Celebration Flagship Ceremony took place at the Palace of the Academies in Brussels (Belgium) on 11–12 April 2019. The event was held in the location where the IAU was founded 100 years ago. #IAU100

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUGA2021 A warm thank you to former IAU President, Ewine van Dishoeck and IAU General Secretary, Maria Teresa Lago. Congratulations for the many accomplishments in leading the IAU during a very challenging triennium.

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International Astronomical Union (IAU)

@IAU_org

2 years

The full programme for the #IAUGA2022 is now available! Check out the list of talks for the Working Group and Office Meetings:

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUoutreach The IAU endorses the International Day of Light to recognise the importance of dark and quiet skies. On 16 May, @IAU_Outreach will be sharing info on the protecting our night skies for science and society. Link: #LightDay2021 #DarkSkies4All

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International Astronomical Union (IAU)

@IAU_org

6 years

#IAU2018 #IAUS348 With increased levels of precision and accuracy, astrometry is enabling the detection of ultra-faint dwarf galaxies resulting in groundbreaking advances in the search for dark matter.

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International Astronomical Union (IAU)

@IAU_org

3 years

IAU is profoundly concerned by the current events in Afghanistan and fears adverse consequences to its scientific community, most notably continued access for women in science and access to education for girls. 🔗 Credit: @IAU_org

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International Astronomical Union (IAU)

@IAU_org

5 years

We have published a new booklet: "From Medicine to Wi-Fi; Technical Applications of Astronomy to Society", detailing developments in astronomy that have permeated throughout modern-day life. #IAU100 #IAUpublications

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International Astronomical Union (IAU)

@IAU_org

11 months

The @IAU_org has announced the names of 20 exoplanetary systems selected from the #NameExoWorlds2022 global contest. The contest was organised as part of the @IAU_Outreach 10th-anniversary celebrations.

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International Astronomical Union (IAU)

@IAU_org

1 year

The 43rd International School for Young Astronomers will take place in Tonantzintla, Mexico, from July 17 - August 4 2023. We encourage early-career graduate students from Latin American and Caribbean countries to apply. Deadline: 20 February #ISYA2023Mx

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International Astronomical Union (IAU)

@IAU_org

5 years

#IAUdivisions IAU Strategic Plan 2020-2030 — visions of the divisions: Division A — Fundamental Astronomy. Image: Motion of the Earth & the Sun around the Galactic Centre. (Diagram not to scale) Credit: Jim Slater, Background image: ESO/S. Brunier.

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International Astronomical Union (IAU)

@IAU_org

5 years

Beginning at 9:00CET tomorrow 11 April, follow along with the #IAU100 Flagship event that will feature high-level representatives and prominent astronomers that will come together to celebrate #astronomy and 100 years of the IAU. Follow the event live at

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International Astronomical Union (IAU)

@IAU_org

1 year

IAU and Astronomy Groups Petition the UN to Address the Impact of Satellites on Dark and Quiet Skies Read more:

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International Astronomical Union (IAU)

@IAU_org

11 months

Early bird registration for the in-person deadline is extended to June 7, 2023, 23:59 JST The IAU Asia-Pacific Regional Meeting (APRIM) will be hosted from August 7 to 11, 2023, in hybrid mode, in-person at Koriyama, Japan and online. #APRIM2023

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International Astronomical Union (IAU)

@IAU_org

5 years

The #IAU100 #100HoursOfAstronomy has arrived! We have over 600 events registered across 82 countries around the world. To see the full list of registered astronomy activities that will be taking place over the coming days from 10-13 January, visit

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International Astronomical Union (IAU)

@IAU_org

6 months

Our warm congratulations to Itziar Aretxaga, Director of the IAU Office for Young Astronomers, who has been awarded the State Prize Luis Rivera Terrazas 2023 in recognition of her academic and scientific career. Image Credit: INAOE

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUnews Today the French Astronomical Society (SAF) will present its prestigious international astronomy award the Jules Janssen Prize to IAU President Ewine F. van Dishoeck. Credit: Ewine F. van Dishoeck

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International Astronomical Union (IAU)

@IAU_org

5 years

#IAU100 has launched its next global project: Astronomy Day in Schools. This initiative aims to mobilise the astronomical community to organise #astronomy activities in schools during and around the week of 10-17 November 2019. To learn more, visit

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International Astronomical Union (IAU)

@IAU_org

4 years

The IAU stands in solidarity with protesters worldwide, united in rejecting the racist and discriminatory behaviour that blights societies across the globe. #ShutDownSTEM #shutdownacademia #strike4blacklives Image credit: NASA

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International Astronomical Union (IAU)

@IAU_org

4 years

After 519 proposals were received for the designated exoplanet system for #Iran , IAU has announced the approved names of Kaveh (star) and Kavian (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

2 months

United Nations Agrees to Address Impact of Satellite Constellations on Astronomy.

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International Astronomical Union (IAU)

@IAU_org

2 years

Check out the #IAUGA2022 group photo below! Where are you?

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International Astronomical Union (IAU)

@IAU_org

4 years

Q: How do I pursue a career in astronomy research? A: A good background in maths, physics, chemistry and computer science from high school to a university degree to a PhD is required to be a modern astronomer. Read more at: Image credit: ESO/M. Zamani

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUmembership The IAU has admitted 11 new Honorary Members, announced during the IAU Business Sessions, held virtually 23-26.08.2021. 🔗 Credit: @IAU_org

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International Astronomical Union (IAU)

@IAU_org

6 years

#IAU2018 Starts today the much awaited XXXth IAU General Assembly. We are happy and honored to welcome all our 3046 Participants from 89 Countries to Vienna, Austria!

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUNews IAU published the second international comparative list of astronomical terms in sign languages, with signs for 86 new terms. Credit: Beatriz Garcia/ @IAU_org - @iau_outreach /NARIT

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International Astronomical Union (IAU)

@IAU_org

4 years

After 251 proposals were received for the designated exoplanet system for #Indonesia , IAU has announced the approved names of Dofida (star) and Noifasui (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

9 months

New Radio Astronomical Observations Confirm Unintended Electromagnetic Radiation Emanating from Large Satellite Read the full IAU Announcement here:

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International Astronomical Union (IAU)

@IAU_org

2 years

Focus Meeting 5 is entitled “Beyond the Goldilocks zone: the effect of stellar magnetic activity on exoplanet habitability” and will leverage recent advancements on solar activity to understand exoplanetary systems. What conversations did you start in FM5? #IAUGA2022

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International Astronomical Union (IAU)

@IAU_org

5 years

We have published a new booklet: "From Medicine to Wi-Fi; Technical Applications of Astronomy to Society", detailing developments in astronomy that have permeated throughout modern-day life. #IAU100 #IAUpublications

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International Astronomical Union (IAU)

@IAU_org

3 months

Join the Women and Girls in Astronomy 2024 celebration! Follow the link for more ideas on how to celebrate: #WomenInAstronomy #WomenInSTEM #IAUoutreach

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnews #IAUprize The Shaw Prize in Astronomy 2020 is awarded to Roger D. Blandford, for his wide-ranging foundational contributions to theoretical astrophysics. Credit: Roger D. Blandford

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International Astronomical Union (IAU)

@IAU_org

4 years

@ThePlanetaryGuy @abbybeall Thanks for your input. The IAU was not consulted on this statement and does not agree with its content.

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International Astronomical Union (IAU)

@IAU_org

7 years

IAU’s reaction to the US #ExecutiveOrder banning access from seven countries

International Astronomical Union | IAU

www.iau.org

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International Astronomical Union (IAU)

@IAU_org

2 years

#IAUnews We have been observing with great concern the events unfolding in Ukraine and fear the adverse consequences for the scientific community, our colleagues, and their families. Read our complete message:

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International Astronomical Union (IAU)

@IAU_org

7 months

Starting today and until 4 October 2023, the IAU Office for Astronomy Outreach (OAO) will hold a 100-hour, round-the-clock, round-the-globe celebration of astronomy. Discover how to join the celebrations!

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International Astronomical Union (IAU)

@IAU_org

4 years

After 297 proposals were received for the designated exoplanet system for #Turkey , IAU has announced the approved names of Anadolu (star) and Göktürk (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUmeetings Starts today! The "Dark and Quiet Skies for Science and Society II", from 3 to 8 October 2021. This conference will be held exclusively online.

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International Astronomical Union (IAU)

@IAU_org

5 years

The European Week of Astronomy & Space Science #EWASS2019 starts today, in Lyon, France, until 28 June 2019. It will host special #IAU100 sessions showcasing activities organised during the 100 years celebrations.

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International Astronomical Union (IAU)

@IAU_org

6 years

#IAU100 Big kick off event with 100 Hours of Astronomy, organised from 10 to 13 January 2019. Everyone around the globe can participate in this joint effort to bring astronomy to the general public.

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International Astronomical Union (IAU)

@IAU_org

2 years

Save the date! The hybrid Asia-Pacific Regional IAU Meeting (APRIM 2023) will take place in person in Koriyama, Japan and online from 7 - 11 August 2023. For more info:

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International Astronomical Union (IAU)

@IAU_org

5 years

Astronomers Invite the Public to Help Name Kuiper Belt Object #IAUnomenclature Image Credit: Alex H. Parker

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International Astronomical Union (IAU)

@IAU_org

2 years

#IAUnews IAU invites all amateur astronomers worldwide to fill out a survey to respond with their views on how best amateurs can engage with the IAU professional community. Survey and details: 🔗 Credit: Fraser Gunn

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International Astronomical Union (IAU)

@IAU_org

5 years

Global Astronomical Community Celebrates the 100th Anniversary of 1919 Solar Eclipse Credit: @IAU_org /Maique Madeira

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International Astronomical Union (IAU)

@IAU_org

4 years

After 20 proposals were received for the designated exoplanet system for #Spain , IAU has announced the approved names of Rosalíadecastro (star) and Riosar (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

17 days

Starts today! Until April 19, 2024, Durham (UK) will host the Kavli-IAU Symposium (IAUS 387) “(Toward) Discovery of Life Beyond Earth and its Impact”. #IAUS387

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International Astronomical Union (IAU)

@IAU_org

4 years

6/6 Finally, we would like to ensure the community of our full commitment to prevent such situations in the future. The IAU would like to thank those who have spoken up on this issue for always demanding nothing short of the best from our community.

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International Astronomical Union (IAU)

@IAU_org

6 years

"We are going to celebrate a century in astronomy. Moreover, we are bringing people from the whole global astronomical community together." Ewine van Dishoeck explains at the #IAU2018 what events will take place during the #IAU100 celebrations.

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International Astronomical Union (IAU)

@IAU_org

6 months

Starts today! The IAU Symposium 386 on "Dark Sky and Astronomical Heritage in Boosting Astro-tourism around the Globe" will be hosted until November 17 in Addis Ababa, Ethiopia. #IAUS386

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnomenclature The most distant object ever to have been visited by a spacecraft has been given a new name: Arrokoth approved by the IAU Working Group for Small Body Nomenclature (WGSBN). Credit: NASA / Johns Hopkins UAPL / SRI / Roman Tkachenko

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International Astronomical Union (IAU)

@IAU_org

19 days

United Nations Agrees to Address Impact of Satellite Constellations on Astronomy.

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International Astronomical Union (IAU)

@IAU_org

5 years

Congratulations to the winners of the #NobelPrize in Physics 2019! James Peebles “for theoretical discoveries in physical cosmology” and Michel Mayor and Didier Queloz “for the discovery of an exoplanet orbiting a solar-type star.” Credit: Nobel Foundation

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International Astronomical Union (IAU)

@IAU_org

9 months

A momentous occasion for Astronomy! Save the Date XXXII IAU General Assembly 6 – 15 August 2024 Cape Town. Registration and Abstract submission commence in September 2023. Join us as we gather under African skies in 2024! For more details, visit

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International Astronomical Union (IAU)

@IAU_org

1 year

We express our heartfelt condolences to the thousands of families and colleagues who have suffered loss in the wake of the devastating earthquake in Turkey and Syria. We stand in support of our fellow astronomers who have been affected by this tragic event.

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International Astronomical Union (IAU)

@IAU_org

3 years

#IAUnews IAU will launch a new initiative called IAU Hands-On Workshops (I-HOW), to help young scientists in developing countries learn how to access and analyse archived astronomical data for their research.

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International Astronomical Union (IAU)

@IAU_org

4 years

After 1500 proposals were received for the designated exoplanet system for #Thailand , IAU has announced the approved names of Chaophraya (star) and Maeping (exoplanet). Learn more about the meaning behind these names at #IAU100 #NameExoWorlds

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International Astronomical Union (IAU)

@IAU_org

9 years

Decide the names for your favourite exoworlds! #NameExoWorlds is now open for public vote http://t.co/GmaTqhqtpA

International Astronomical Union | IAU

www.iau.org

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International Astronomical Union (IAU)

@IAU_org

22 days

The IAU CPS has released a paper entitled 'Call to Protect the Dark and Quiet Sky from Harmful Interference by Satellite Constellations' that states its recommendations for the mitigation of satellite constellations’ impact on astronomy.

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUmeeting The "Dark and Quiet Skies for Science and Society" workshop will be held online from 5-9 October 2020. The workshop is being organised by @IAU_org , @UNOOSA and @IAC_Astrofisica . Learn more here:

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnews The names of 112 sets of exoplanets and host stars named in the #IAU100 #NameExoWorlds campaigns were announced today at a press conference in Paris. Over 780 000 people worldwide participated in the campaign. Credit: @IAU_org

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International Astronomical Union (IAU)

@IAU_org

1 year

IAU Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference (CPS) welcomes support from G7 Science Ministers on Dark and Quiet Skies. Read the full story here:

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International Astronomical Union (IAU)

@IAU_org

5 years

#IAUnews A new object from #interstellar space has been found within the Solar System, only the second such discovery of its kind. The object has been given the name 2I/Borisov by the IAU. Credit: Gemini Observatory/NSF/AURA

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International Astronomical Union (IAU)

@IAU_org

7 years

Final countdown to August 21 Total Solar #Eclipse . Wherever you are, we wish you all clear skies and that you have an amazing experience!

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International Astronomical Union (IAU)

@IAU_org

5 years

To celebrate the 50th anniversary of the 1969 Apollo 11 Moon landing, the #IAU100 has set up dedicated website to coordinate global events and large Moon observation activities.

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International Astronomical Union (IAU)

@IAU_org

1 year

The IAU Symposium 385 will focus on "Astronomy and Satellite Constellations: Pathways Forward", and it will take place in La Palma, Canary Islands (Spain), on 2-6 October 2023. Registration is open, and the deadline for IAU Travel Grants is June 30, 2023.

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International Astronomical Union (IAU)

@IAU_org

5 months

Starts today! The XVII Latin American Regional IAU Meeting will be held in Montevideo, Uruguay until December 1st, 2023. #LARIM2023

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International Astronomical Union (IAU)

@IAU_org

5 years

Today the IAU is hosting its first event for amateur astronomers as part of the #IAU100 Flagship event in Brussels. Through presentations by both professional and amateur astronomers, this meeting aims to further build the relationship between amateur astronomers and the IAU.

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International Astronomical Union (IAU)

@IAU_org

6 years

#IAU2018 The Southern African Large Telescope (SALT) is both the largest single optical telescope in the southern hemisphere and an important driver for human capital development in South Africa.

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International Astronomical Union (IAU)

@IAU_org

2 years

We have truly been treated to a beautiful venue for this IAU GA. Thank you, Busan! #IAUGA2022

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International Astronomical Union (IAU)

@IAU_org

2 years

#Astro4Edu The new IAU Office of Astronomy for Education website is now online.

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International Astronomical Union (IAU)

@IAU_org

4 years

The celebration of the 30th anniversary of the #PaleBlueDot image around 13-20 February is the final #IAU100 global project. To date, activities are registered in more than 40 countries for this worldwide astronomy event. Learn more and register here:

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International Astronomical Union (IAU)

@IAU_org

1 year

Important information #IAUS385 Registration is open! The IAU Symposium 385 will focus on "Astronomy and Satellite Constellations: Pathways Forward", and it will take place in La Palma, Canary Islands (Spain), on 2-6 October 2023.

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUnews The Gruber Foundation Cosmology Prize, co-sponsored by the IAU, has been awarded in 2020 to Lars Hernquist and Volker Springel for their pioneering work on cosmological simulations. Credit: @IAU_org

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International Astronomical Union (IAU)

@IAU_org

4 years

#IAUpublication The IAU celebrated its 100th year in 2019, and you can read more about the IAU in this time in "The IAU 1919-2019" brochure. Read the brochure here: Image credit: IAU/M. Zamani

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