This is a hybrid workshop that will be held in Athens, Greece, on the 27th, 28th and 29th of September 2022. It will provide the opportunity to discuss the impact of the Gaia mission, and especially of Gaia Data Release 3 (DR3), on extragalactic science. This is particularly timely, as DR3 (released on 13th of June 2022) includes results on galaxies and quasars, for the first time.
The workshop covers three aspects of extragalactic science with Gaia, starting with the expected improvement of the distance scale. DR3 includes light curves of thousands of variables, customarily used for distance determinations and is expected to have a major impact on the field. The second aspect is the study of resolved nearby galaxies (in the Local Group), including the Magellanic Clouds, MW dwarf satellites and the M31 group. Our understanding of the kinematics and dynamics of our local galaxy environment has been revolutionized by the wealth and accuracy of Gaia data.  The third aspect is novel in DR3, which includes, for the first time, over 100 thousand low resolution, flux-calibrated spectra of quasars and unresolved galaxies. There will also be a hands-on training session for young scientists to familiarize themselves with accessing and utilizing Gaia DR3 data, particularly the new products.

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