Exploring the Universe with Gaia: 3rd data delivery – Observatoire de Paris

The main national and European actors involved in Gaia will be in Nice on 13 June to present the mission and content of this new catalog to the international, national and regional press as well as to the public.

The most important scientific findings that are still under embargo to this day will be revealed. Unpublished news about the various components of the universe will then be presented.

We can mention in particular the first chemical mapping of the Milky Way, which leads to a new understanding of our galaxy and the properties of the stars that make it up, an unprecedented exploration of the interstellar medium and the galactic disk, an unprecedented description of the small bodies of the solar system, …

Many presentations are planned for this day as well as a press conference and discussion moments between the scientists and journalists present. The detailed program for the day will be unveiled in early June.

Practical events

Journalists wishing to participate in this day and have early access to the scientific findings that will be revealed when the embargo is lifted should contact the Communications Department of the Côte d’Azur Observatory.

Gaia is a large mission of the European Space Agency (ESA), launched in 2013 to map the sky and observe both the very dense universe (the solar system) and very distant (the most distant galaxies). More precisely, Gaia maps our galaxy, the Milky Way, in 3D and reveals its composition, formation and evolution.

Gaia thus gives with unprecedented accuracy the position in the galaxy of almost 1.7 billion stars, or almost 1% of all the stars in the Milky Way. Thanks to the various instruments on board, the kinematics of a very large number of these stars are also determined as well as their physical properties (such as their surface temperature) and their chemical composition.

The goals of this mission are therefore several and affect almost every branch of global astrophysics.


On the program for Monday, June 13, 2022

8:30 – Reception of guests in the Grande Coupole at the Mont-Gros site in Nice

09:00 – Opening of the day, welcome speaker:

Stéphane Mazevet, Director of the Côte d’Azur Observatory,

Philippe Baptiste, President of CNES (video message),

Caroline Laurent, Director of Orbital Systems and Applications at CNES,

Anthony Brown, DPAC Chairman,

Philippe Stee, Director of the Lagrange Laboratory (CNRS-UCA-OCA).

9:20 – Gaia and the French contribution to the Gaia mission

9:30 – François Mignard, Scientific Director of Gaia France: The Gaia Mission and the French Contribution

9:45 – Chantal Panem, Gaia Mission and Operations Manager at CNES: DR3 and the role of CNES in the French contribution

10:00 – ESA Gaia / DR3 event (in English, simultaneous translation for the audience present in Nice)

10:00 – Explanatory video about Gaia

10:01 – Intro by ESA moderator: Ninja Menning.

10:02 – ESA General Director + ESA Director of Science

10:08 – Video: Summary of DR3 outreach material

10:09 – Gaia / DR3 presentations:

Timo Prusti, Gaia Project Scientist, ESA;

Anthony Brown, DPAC Chairman;

Antonella Vallenari, Vice President of DPAC;

Conny Aerts, professor at the University of Louvain.

10:45 – Press conference. Questions and answers.

10:50 – Break

11:00 – Press conference: the main scientific results of DR3 and their French contributions

11:00 – Paolo Tanga, astronomer at the Côte d’Azur Observatory, Lagrange Laboratory (CNRS-UCA-OCA), Planetology and small bodies in the solar system

11:08 – Paola Sartoretti, CNRS Research Engineer at the Paris Observatory – PSL (GEPI – Paris Observatory-PSL / CNRS), The largest catalog of Stellar Speeds

11:16 – Frédéric Arenou, CNRS Research Engineer at the Paris Observatory – PSL (GEPI – Paris Observatory-PSL / CNRS), Discover hidden companions

11:24 – Orlagh Creevey, Assistant Astronomer at Côte d’Azur Observatory, Lagrange Laboratory (CNRS-UCA-OCA), Characterization of stars, dust and extragalactic objects

11:35 – Alejandra Recio-Blanco, astronomer at the Côte d’Azur Observatory, Lagrange Laboratory (CNRS-UCA-OCA), The Milky Way: Cartography and Interstellar Medium

11:48 – Christine Ducourant, Assistant Astronomer at the Aquitaine Observatory of Sciences of the Universe, Bordeaux Astrophysics Laboratory (CNRS-University of Bordeaux), Gaia explores the deep universe

12:00 – Opening of DR3 archives (ESAC) – Re-transmission of ESA event + CDS / Strasbourg presentation

12:15 – Press conference, questions / answers

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