The Gaia mission is a space observatory launched by the European Space Agency (ESA) in 2013 with the aim of creating a detailed 3D map of the Milky Way galaxy. Gaia's primary goal is to precisely measure the positions, distances, motions, and properties of over a billion stars in our galaxy, providing unprecedented insights into its structure, composition, and evolution. The data collected by Gaia is expected to revolutionize our understanding of the Milky Way and the universe as a whole.