![]() Gaia’s exceptionally accurate distances, motions, and fundamental parameters of stars, as well as the classification of quasars and the accurate astrometry of asteroids are now part of the everyday work and research of most astronomers. Published in June 2022, the third version of the most complete and detailed catalog of stars (Gaia DR3) is a milestone in astrophysical research. The Gaia satellite has been charting the sky since 2014, and its map includes stars that are a million times fainter than can be seen with the naked eye. ![]() The results are very promising, making this delivery a first teaser of what will be the fourth version of the Gaia catalog (Gaia DR4), expected by the end of 2025. The European Space Agency (ESA) and the Gaia collaboration teams have published new data in the form of five Focused Product Releases. This huge stellar census will provide the data needed to tackle an enormous range of important questions related to the origin, structure, and evolutionary history of our galaxy. It is mapping their motions, luminosity, temperature, and composition. Gaia is creating an extraordinarily precise three-dimensional map of more than a billion stars throughout our Milky Way galaxy and beyond.
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