Launched in December 2013, Gaia is destined to create the most accurate map yet of the Milky Way. By making accurate measurements of the positions and motions of stars in the Milky Way, it will answer questions about the origin and evolution of our home galaxy.
The first data release (2016) contains three-dimensional positions and two-dimensional motions of a subset of two million stars. The second data release (2018) increases that number to over 1.6 Billion. In 2022, with the third data release, the number of sources increased to 1.8 Billion. Gaia’s measurements include high quality photometry, astrometric parameters, spectra and time series. The Gaia Data Release 3 (DR3) was published on 13rd of June 2022.
Picture credits: ESO, Kristin Riebe/AIP