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December 2018

Dear friends and colleagues,

And so it begins. The much-awaited IAU centenary celebrations will start soon with nearly 700 events in over 70 countries reported and registered on our platform so far. The IAU100 Secretariat, the Office for Astronomy Outreach (OAO) and the IAU Secretariat are actively engaged in preparing for an exciting year ahead. We want to share that excitement with you — a century of fantastic science, technological progress and inspiration.

Our IAU and IAU100 programs are tailored to the communities we have proudly been serving for the past one hundred years. Within our regular IAU activities there will be 9 IAU Symposia in 2019, including the first IAU symposium on equality, diversity and inclusion. In 2019 the IAU will also contribute to the training of the next generation of astronomers through the International School for Young Astronomers run by the Office for Young Astronomers, while astronomy for development is stimulated by a dozen projects endorsed by the Office for Astronomy for Development. For IAU100 specifically, the celebrations at a national and local level will be supported by more than 100 IAU100 national committees established through the OAO. Examples of upcoming global projects are listed below. We encourage all members of our community to participate in and/or organise and register events under the IAU100 banner.

The year will start with a world-wide kick-off event — the 100 Hours of Astronomy, running from 10 to 13 January 2019 and with nearly 200 events registered in over forty different countries. Everyone around the globe can participate in this joint effort to bring astronomy to the public.

Also, the International Astronomical Union 1919–2019: 100 Years Under One Sky Flagship event will be held on 11–12 April 2019 at the Palace of the Academies in Brussels, Belgium. The event will include the participation of the Nobel Prize Laureate Brian Schmidt and astronauts John Grunsfeld and Chiaki Mukai as keynote speakers. Participation in this event is primarily by invitation; however, in January 2019 there will be information about the possibility for others to attend as well: stay tuned for more information.

The IAU centennial celebrations are made possible thanks to a wide variety of partners. We welcome new organisations coming on board to support the IAU100 goals. You can review the various possibilities here .

Please see the IAU100 website and follow us on our Twitter and Facebook pages to stay up to date with the latest news, and use hashtag #IAU100 for anything related to the celebrations. For any enquiries, please contact the IAU100 Coordinator Jorge Rivero González at

We strongly encourage everyone to join and participate in this diverse selection of initiatives which will bring the international astronomy community together united “Under One Sky”.

Seasonal greetings, and our very best wishes for 2019!

Ewine van Dishoeck
IAU President

Teresa Lago
IAU General Secretary

  IAU Press Releases

Join the Celebration of A Hundred Years under One Sky

21 December 2018: In 2019, the International Astronomical Union (IAU) is celebrating its 100th anniversary (IAU100) and the astronomical breakthroughs that have shaped science, technology and culture throughout the last century. The year-long ...

  IAU Public Announcements

Become an IAU100 Partner

21 December 2018:   The IAU centennial celebrations are possible thanks to a wide variety of partners. We also welcome new organisations coming on board to support the IAU100 goals. You can review the ...

Read more

“Under One Sky" Short Story Competition is Launched

21 December 2018:   The IAU values the engagement of young scientists in its activities. We are pleased to invite students worldwide to take part in the IAU100 written contest “Under One Sky”. This ...

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IAU100 Special Projects announced

21 December 2018:   The IAU has supported 21 IAU100 Special Projects, which are national and local initiatives around the world that follow the goals of the celebrations. The collection of IAU100 projects comprises ...

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Bring the Above and Beyond Exhibition to your Community

21 December 2018:   The Above and Beyond open-source exhibition features some of the most relevant and astonishing astronomical breakthroughs that have shaped science, technology and culture throughout the last century. Now you can ...

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Celebrate IAU100 Women and Girls in Astronomy Day in Your Country

21 December 2018: The IAU100 Secretariat encourages the organisation of activities around the United Nations International Day of Women and Girls in Science in February 2019. Activities organised around 11 February will be ...

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100 Hours of Astronomy Event on 10–13 January 2019

21 December 2018: The kick-off event for IAU100 in 2019 is the 100 Hours of Astronomy: a global celebration composed of a broad range of activities aimed at involving the public. This will ...

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Riccardo Giacconi (1931–2018)

12 December 2018: Riccardo Giacconi, a notable member of the IAU community, passed away on Sunday 9 December 2018 at the age of 87. Riccardo Giacconi was born in Genoa, Italy on 6 ...

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Astronomy Outreach Newsletter 2018 #23 (December #1)

11 December 2018: The Astronomy Outreach Newsletter 2018 #23 is now online. It is produced by the IAU Office for Astronomy Outreach and brings to the general public the latest information about events ...

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IAU Office for Astronomy Outreach Office for Astronomy Outreach

Scientific Dates & Deadlines

14 - 16 Jan 2019
Officers Meeting 2019

14 - 19 Apr 2019
IAUS 350: Laboratory Astrophysics: from Observations to Interpretation

13 - 15 May 2019
EC Meeting 103 (IAU 100 Anniversary)

27 - 31 May 2019
IAUS 351: Star Clusters: from the Milky Way to the Early Universe

Administrative Dates & Deadlines

31 Dec 2018
DEADLINE to Accept Junior Membership Applications (from the applicants)

31 Dec 2018
Deadline for Letters of Intent to be submitted to the IAU General Secretary to host the OAE

1 Jan 2019
DEADLINE for Items Submitted to go on the OM Agenda

14 - 16 Jan 2019
Officers Meeting 2019


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