Mapping the Universe A first part of the third Gaia data catalogue will be published on 03 December 2020 at 12:00 (CET). By then, entries for almost 1.8 billion celestial bodies will be available. To mark this occasion, DLR's Space Administration and its German Gaia partners are organising an online event to present the uniqueness of this third data catalogue and the Gaia mission to the public.